Roll buildtools/third_party/libunwind/trunk/ 7ff728a97..aabcd8753 (8 commits)

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libunwind.git/+log/7ff728a9779c..aabcd8753678

Created with:
  roll-dep buildtools/third_party/libunwind/trunk

Change-Id: I37bc7caed471a4f5f8179d50fd053eb704817780
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/100510
Reviewed-by: Nigi <nigi@chromium.org>
Auto-Submit: Lei Zhang <thestig@chromium.org>
Commit-Queue: Nigi <nigi@chromium.org>
diff --git a/DEPS b/DEPS
index bec1376..012ea3b 100644
--- a/DEPS
+++ b/DEPS
@@ -110,7 +110,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libunwind
   # and whatever else without interference from each other.
-  'libunwind_revision': '7ff728a9779cdc8e0639c032dc45cc20f7b4af21',
+  'libunwind_revision': 'aabcd8753678f1536e15eb6385a948470debdae4',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling lss
   # and whatever else without interference from each other.