Roll buildtools/ and third_party/libc++/src/ part 1

Roll third_party/libc++/src/ 1fe5dc4db..39e674e51 (25 commits)

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxx.git/+log/1fe5dc4dbb07..39e674e51a7d

Roll buildtools/ e796a7e40..f47eda394 (3 commits)

https://chromium.googlesource.com/chromium/src/buildtools.git/+log/e796a7e40daf..f47eda3946cd

Change-Id: Ib0fb9892a3942d4f2324aac5591d36e02730d706
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/124796
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 c9da42a..5bcdeff 100644
--- a/DEPS
+++ b/DEPS
@@ -82,7 +82,7 @@
   # 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': 'e796a7e40dafb8572f517080436b516597e1e466',
+  'buildtools_revision': 'f47eda3946cd680b22ad0a0749148ead072ac178',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling catapult
   # and whatever else without interference from each other.
@@ -152,7 +152,7 @@
   # and whatever else without interference from each other.
   # If you change this, also update the libc++ revision in
   # //buildtools/deps_revisions.gni.
-  'libcxx_revision': '1fe5dc4dbb07fa54613a5d2aa63db25e1ba9d20b',
+  'libcxx_revision': '39e674e51a7dc3d8e4dc7574fa4e1e75c73116af',
   # 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.