Roll libc++ from 4399383935f8 to 038521e9561d (6 revisions)

4399383935..038521e956

2023-11-17 eric@efcs.ca Add libc++ github actions workflow to replace buildkite (#71836)
2023-11-17 ldionne.2@gmail.com [libc++][NFC] Fix include guard for simd helper header
2023-11-17 4922191+AdvenamTacet@users.noreply.github.com [NFC] Remove outdated comment (#72591)
2023-11-16 koraq@xs4all.nl [libc++] Fixes lit portability issues. (#72435)
2023-11-16 ldionne.2@gmail.com [runtimes] Add TODO about CXX_STANDARD_REQUIRED being off after review comment
2023-11-16 eric@efcs.ca Refactor dockerfile to support Buildkite AND Github Actions (#71954)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/libcxx-chromium
Please CC hans@chromium.org,thakis@chromium.org on the revert to ensure that a human
is aware of the problem.

To file a bug in Chromium: https://bugs.chromium.org/p/chromium/issues/entry

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Tbr: hans@chromium.org,thakis@chromium.org
Change-Id: I490c396fdb1d500e6ac7fbcb489fd5eb064bca76
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5041210
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1226151}

DEPS

@@ -500,7 +500,7 @@ vars = {
 
   # If you change this, also update the libc++ revision in
   # //buildtools/deps_revisions.gni.
-  'libcxx_revision':       '4399383935f808337a178b81e0c6657bf7e33f6c',
+  'libcxx_revision':       '038521e9561dab50fc8b50ef987e87225f39c8f6',
 
   # GN CIPD package version.
   'gn_version': 'git_revision:bc5744174d9ea1c292f3f08cfb95fa97ea5c595e',

buildtools/deps_revisions.gni

@@ -5,5 +5,5 @@
 declare_args() {
   # Used to cause full rebuilds on libc++ rolls. This should be kept in sync
   # with the libcxx_revision vars in //DEPS.
-  libcxx_revision = "4399383935f808337a178b81e0c6657bf7e33f6c"
+  libcxx_revision = "038521e9561dab50fc8b50ef987e87225f39c8f6"
 }