Roll third_party/llvm-libc/src/ 4b760d9a7..e9d9246e8 (49 commits)

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libc.git/+log/4b760d9a76f9..e9d9246e8dae

Created with:
  roll-dep third_party/llvm-libc/src

Change-Id: I928c4c5b558f1fb61ff06ebaab0f5eb9adeead46
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/131590
Auto-Submit: Andy Phan <andyphan@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 31db1d2..e4a0929 100644
--- a/DEPS
+++ b/DEPS
@@ -172,7 +172,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling llvm-libc
   # and whatever else without interference from each other.
-  'llvm_libc_revision': '4b760d9a76f959f97c273217791a9b6b435ccd86',
+  'llvm_libc_revision': 'e9d9246e8dae0416c37c01ea955e2d5429659c54',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling markupsafe
   # and whatever else without interference from each other.