See rust-random/rand#1739

Replace ad-hoc atomic lazy caches with shared lazy helpers in the
Linux/Android fallback, NetBSD, RDRAND, and RNDR backends. Adds
`LazyPtr` and `LazyBool` so pointer and boolean caches use
the same initialization contract.

This reduces duplicated cache logic and keeps backend probing/fallback
semantics aligned while preserving the existing retry-until-cached
behavior.

We expect that these system calls will never return anything other than
0 or -1 but if they do for some reason, then we shouldn't access
`errno`.

Bumps the all-deps group with 3 updates:
[anyhow](https://github.com/dtolnay/anyhow),
[bumpalo](https://github.com/fitzgen/bumpalo) and
[syn](https://github.com/dtolnay/syn).

Updates `anyhow` from 1.0.101 to 1.0.102
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/anyhow/releases">anyhow's
releases</a>.</em></p>
<blockquote>
<h2>1.0.102</h2>
<ul>
<li>Remove backtrace dependency (<a
href="https://redirect.github.com/dtolnay/anyhow/issues/438">#438</a>,
<a
href="https://redirect.github.com/dtolnay/anyhow/issues/439">#439</a>,
<a
href="https://redirect.github.com/dtolnay/anyhow/issues/440">#440</a>,
<a
href="https://redirect.github.com/dtolnay/anyhow/issues/441">#441</a>,
<a
href="https://redirect.github.com/dtolnay/anyhow/issues/442">#442</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/anyhow/commit/5c657b32522023a9f7ef883fb08582fd8e656b1a"><code>5c657b3</code></a>
Release 1.0.102</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/e737fb63918e8c71a3d0a968004a9c7ed7942283"><code>e737fb6</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/anyhow/issues/442">#442</a>
from dtolnay/backtrace</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/7fe62b51c62804f8b84443affeacfb3810ed2516"><code>7fe62b5</code></a>
Further simply backtrace conditional compilation</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/c8cb5cae23e57a2dbb87bf05cba04f1df1f1660b"><code>c8cb5ca</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/anyhow/issues/441">#441</a>
from dtolnay/backtrace</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/de27df7e0f510d543c18e50a0736566b66e62baf"><code>de27df7</code></a>
Delete CI use of --features=backtrace</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/9b67e5dd608658d805640cf1b6f6c9d091686ec1"><code>9b67e5d</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/anyhow/issues/440">#440</a>
from dtolnay/backtrace</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/efdb11a259ca58a2e505ef50486cf2d6b5ddc42a"><code>efdb11a</code></a>
Simplify <code>std_backtrace</code> conditional code</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/b8a9a707838969721a86b28e3c45ce27e279e981"><code>b8a9a70</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/anyhow/issues/439">#439</a>
from dtolnay/backtrace</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/a42fc2c21846ba459df43a3f8b4996a2074909cb"><code>a42fc2c</code></a>
Remove <code>feature = &quot;backtrace&quot;</code> conditional
code</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/2a2a3ceb4cbc409fd99613ab5744b21e825e7908"><code>2a2a3ce</code></a>
Re-word backtrace feature comment</li>
<li>Additional commits viewable in <a
href="https://github.com/dtolnay/anyhow/compare/1.0.101...1.0.102">compare
view</a></li>
</ul>
</details>
<br />

Updates `bumpalo` from 3.19.1 to 3.20.2
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/fitzgen/bumpalo/blob/main/CHANGELOG.md">bumpalo's
changelog</a>.</em></p>
<blockquote>
<h2>3.20.2</h2>
<p>Released 2026-02-19.</p>
<h3>Fixed</h3>
<ul>
<li>Restored <code>Send</code> and <code>Sync</code> implementations for
<code>Box&lt;T&gt;</code> for <code>T: ?Sized</code> types
as well.</li>
</ul>
<hr />
<h2>3.20.1</h2>
<p>Released 2026-02-18.</p>
<h3>Fixed</h3>
<ul>
<li>Restored <code>Send</code> and <code>Sync</code> implementations for
<code>Box&lt;T&gt;</code> when <code>T: Send</code> and <code>T:
Sync</code> respectively.</li>
</ul>
<hr />
<h2>3.20.0</h2>
<p>Released 2026-02-18.</p>
<h3>Added</h3>
<ul>
<li>Added the <code>bumpalo::collections::Vec::pop_if</code>
method.</li>
</ul>
<h3>Fixed</h3>
<ul>
<li>Fixed a bug in the <code>bumpalo::collections::String::retain</code>
method in the face
of panics.</li>
<li>Made <code>bumpalo::collections::Box&lt;T&gt;</code> covariant with
<code>T</code> (just like
<code>std::boxed::Box&lt;T&gt;</code>).</li>
</ul>
<hr />
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/fitzgen/bumpalo/commit/1aad072f93d8a4cf5885446ead554927c7c94f9c"><code>1aad072</code></a>
Bump to version 3.20.2 (<a
href="https://redirect.github.com/fitzgen/bumpalo/issues/312">#312</a>)</li>
<li><a
href="https://github.com/fitzgen/bumpalo/commit/2fb1d6ae40c56e875cbef9767ae0773e32d60387"><code>2fb1d6a</code></a>
Add more tests for send and sync behavior, support unsized types (<a
href="https://redirect.github.com/fitzgen/bumpalo/issues/311">#311</a>)</li>
<li><a
href="https://github.com/fitzgen/bumpalo/commit/7c8d1f3870ef2317b1c9b3ef36f6439a6144448e"><code>7c8d1f3</code></a>
Bump to 3.20.1 (<a
href="https://redirect.github.com/fitzgen/bumpalo/issues/310">#310</a>)</li>
<li><a
href="https://github.com/fitzgen/bumpalo/commit/e06b36ba0cdc94e905a9dc8d7f1ec1abc6d1e34e"><code>e06b36b</code></a>
Restore Send and Sync for Box (<a
href="https://redirect.github.com/fitzgen/bumpalo/issues/309">#309</a>)</li>
<li><a
href="https://github.com/fitzgen/bumpalo/commit/cb7f03318fbc7eb4559bca301a4bb9e0c2ba58c5"><code>cb7f033</code></a>
Bump to 3.20.0 (<a
href="https://redirect.github.com/fitzgen/bumpalo/issues/307">#307</a>)</li>
<li><a
href="https://github.com/fitzgen/bumpalo/commit/d97d31cdc5fbd45e19e530962c2b7da0b90e8171"><code>d97d31c</code></a>
Make box covariant (<a
href="https://redirect.github.com/fitzgen/bumpalo/issues/304">#304</a>)</li>
<li><a
href="https://github.com/fitzgen/bumpalo/commit/f9256f785dfc11faacec160c30bdd2d57dad95a0"><code>f9256f7</code></a>
Pin quickcheck (<a
href="https://redirect.github.com/fitzgen/bumpalo/issues/306">#306</a>)</li>
<li><a
href="https://github.com/fitzgen/bumpalo/commit/a006efb3a1f42bffc992a8f7f097923cf2c69f2f"><code>a006efb</code></a>
Fix String::retain panic safety yielding invalid UTF-8 (<a
href="https://redirect.github.com/fitzgen/bumpalo/issues/302">#302</a>)</li>
<li><a
href="https://github.com/fitzgen/bumpalo/commit/96ba38651470cd3929cd793906a25217bab02256"><code>96ba386</code></a>
Add pop_if() to Vec (<a
href="https://redirect.github.com/fitzgen/bumpalo/issues/301">#301</a>)</li>
<li>See full diff in <a
href="https://github.com/fitzgen/bumpalo/compare/v3.19.1...v3.20.2">compare
view</a></li>
</ul>
</details>
<br />

Updates `syn` from 2.0.116 to 2.0.117
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/syn/releases">syn's
releases</a>.</em></p>
<blockquote>
<h2>2.0.117</h2>
<ul>
<li>Fix parsing of <code>self::</code> pattern in first function
argument (<a
href="https://redirect.github.com/dtolnay/syn/issues/1970">#1970</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/syn/commit/7bcb37cdb3399977658c8b52d2441d37e42e48f2"><code>7bcb37c</code></a>
Release 2.0.117</li>
<li><a
href="https://github.com/dtolnay/syn/commit/9c6e7d3b8df7b30909d60395f88a6ca07688e1c1"><code>9c6e7d3</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1970">#1970</a>
from dtolnay/receiver</li>
<li><a
href="https://github.com/dtolnay/syn/commit/019a84847eded0cdb1f7856e0752ba618155cfc9"><code>019a848</code></a>
Fix self:: pattern in first function argument</li>
<li><a
href="https://github.com/dtolnay/syn/commit/23f54f3cf61ddedd5daea4f347eca2d4b84c8abb"><code>23f54f3</code></a>
Update test suite to nightly-2026-02-18</li>
<li><a
href="https://github.com/dtolnay/syn/commit/b99b9a627c46580343398472e7b08a131357a994"><code>b99b9a6</code></a>
Unpin CI miri toolchain</li>
<li>See full diff in <a
href="https://github.com/dtolnay/syn/compare/2.0.116...2.0.117">compare
view</a></li>
</ul>
</details>
<br />


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### Changed
- Bump `r-efi` dependency to v6 [#814]

### Fixed
- Read `errno` only when it is set [#810]
- Check the return value of `ProcessPrng` on Windows [#811]

[#810]: #810
[#811]: #811
[#814]: #814