build: disable the custom libcxx on Windows

MarshallOfSound · MarshallOfSound · commit fe06784a3b61 · 2019-04-02T14:43:06.000-07:00
diff --git a/build/args/all.gn b/build/args/all.gn
@@ -13,3 +13,7 @@ ffmpeg_branding = "Chrome"
 enable_basic_printing = true
 
 is_cfi = false
+
+if (is_win) {
+  use_custom_libcxx = false
+}
