Roll buildtools/ and third_party/libc++/src/ part 2

Roll third_party/libc++/src/ 39e674e51..e2d898ca2 (12 commits)

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxx.git/+log/39e674e51a7d..e2d898ca22f1

Roll buildtools/ f47eda394..7f979120b (5 commits)

https://chromium.googlesource.com/chromium/src/buildtools.git/+log/f47eda3946cd..7f979120bfa8

Change-Id: I724093efd627764b91d95fd044c14f08b9024b99
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/124777
Auto-Submit: Andy Phan <andyphan@chromium.org>
Commit-Queue: Andy Phan <andyphan@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 29d746d..71c632a 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': 'f47eda3946cd680b22ad0a0749148ead072ac178',
+  'buildtools_revision': '7f979120bfa80658a4e48c596e9de989477b3311',
   # 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': '39e674e51a7dc3d8e4dc7574fa4e1e75c73116af',
+  'libcxx_revision': 'e2d898ca22f1d5863d8f6a7a0df849109483e05f',
   # 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.