Roll libc++ from 03126836471a to 450ae0d29766 (2 revisions)

0312683647..450ae0d297

2024-07-03 de34@live.cn [libc++] Fix the signatures of `std::rethrow_if_nested` (#91365)
2024-07-03 nikolasklauser@berlin.de [libc++] Use GCC compilers from compiler explorer (#97219)

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: Ib0295798cb002975d099a63be9d58ce500d5a741
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5677644
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@{#1323098}

DEPS

@@ -506,7 +506,7 @@ vars = {
 
   # If you change this, also update the libc++ revision in
   # //buildtools/deps_revisions.gni.
-  'libcxx_revision':       '03126836471ae2ee39958766b6e2a6dc7023ade1',
+  'libcxx_revision':       '450ae0d29766e87ea12148e8c6c3352053f78e15',
 
   # GN CIPD package version.
   'gn_version': 'git_revision:b2afae122eeb6ce09c52d63f67dc53fc517dbdc8',

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 = "03126836471ae2ee39958766b6e2a6dc7023ade1"
+  libcxx_revision = "450ae0d29766e87ea12148e8c6c3352053f78e15"
 }