Roll buildtools and libc++

Roll buildtools/ 9ad5f9f67..c20dc6aae (28 commits)

https://chromium.googlesource.com/chromium/src/buildtools.git/+log/9ad5f9f67995..c20dc6aaed34

Created with:
  roll-dep buildtools

Roll buildtools/third_party/libc++/trunk/ bd44075f8..e136ec503 (91 commits)

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxx.git/+log/bd44075f8521..e136ec5032a5

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

Change-Id: Ic4fb0af8d37300b1d484807358099e72b3e2ae51
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/104414
Auto-Submit: Lei Zhang <thestig@chromium.org>
Commit-Queue: K. Moon <kmoon@chromium.org>
Reviewed-by: K. Moon <kmoon@chromium.org>
diff --git a/DEPS b/DEPS
index 6a76290..9ef3dca 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': '9ad5f9f679950e8dc7d9175530098f2c107fd306',
+  'buildtools_revision': 'c20dc6aaed34476b801c2e4bb880f7f90b4587ae',
   # 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': 'bd44075f852154e64d1657b13f074b976ec92cd3',
+  'libcxx_revision': 'e136ec5032a5e5d97e988ce66e8c269a80ff54c4',
   # 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.