Roll DEPS for buildtools and libc++.

Roll buildtools/ cccaf48c8..8d4ff27e8 (47 commits)

https://chromium.googlesource.com/chromium/src/buildtools.git/+log/cccaf48c82bc..8d4ff27e86bf

Created with:
  roll-dep buildtools

Roll buildtools/third_party/libc++/trunk/ 5ee02b299..ae1fbc403 (164 commits)

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxx.git/+log/5ee02b299379..ae1fbc40376d

Created with:
  roll-dep buildtools/third_party/libc++/trunk

Change-Id: I03e095003df1219d830d4fe08539cfb1c7c0319e
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/101919
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: K. Moon <kmoon@chromium.org>
diff --git a/DEPS b/DEPS
index d196d79..74e7ee1 100644
--- a/DEPS
+++ b/DEPS
@@ -46,7 +46,7 @@
   # 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': 'cccaf48c82bcf4ddafa6f8aa9f06014a1ef434bf',
+  'buildtools_revision': '8d4ff27e86bfa3044b9fdb0abcb029a2ebbf8109',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling catapult
   # and whatever else without interference from each other.
@@ -104,7 +104,7 @@
   # and whatever else without interference from each other.
   # If you change this, also update the libc++ revision in
   # //buildtools/deps_revisions.gni.
-  'libcxx_revision': '5ee02b299379896f90faa88f576be98c61156f26',
+  'libcxx_revision': 'ae1fbc40376dff4c5b58bd1f8d38211d260259a0',
   # 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.