Roll buildtools and libc++

Roll buildtools/ 4e0e9c73a..f15f314b7 (6 commits)

https://chromium.googlesource.com/chromium/src/buildtools.git/+log/4e0e9c73a0f2..f15f314b785b

Created with:
  roll-dep buildtools

Roll third_party/libc++/src/ e3b94d0e5..852bc6746 (46 commits)

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxx.git/+log/e3b94d0e5b86..852bc6746f45

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

Change-Id: I4bfd08a222f958e0f4fefd58cf37061e5a2ac938
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/120090
Reviewed-by: Thomas Sepez <tsepez@google.com>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Commit-Queue: Thomas Sepez <tsepez@google.com>

DEPS

diff --git a/DEPS b/DEPS
index 74b2a14..b99661f 100644
--- a/DEPS
+++ b/DEPS
@@ -76,7 +76,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling buildtools
   # and whatever else without interference from each other.
-  'buildtools_revision': '4e0e9c73a0f26735f034f09a9cab2a5c0178536b',
+  'buildtools_revision': 'f15f314b785b7a8ce19ca2851989b2da7fe6d004',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling catapult
   # and whatever else without interference from each other.
@@ -138,7 +138,7 @@
   # and whatever else without interference from each other.
   # If you change this, also update the libc++ revision in
   # //buildtools/deps_revisions.gni.
-  'libcxx_revision': 'e3b94d0e5b86883fd77696bf10dc33ba250ba99b',
+  'libcxx_revision': '852bc6746f45add53fec19f3a29280e69e358d44',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libc++abi
   # and whatever else without interference from each other.