Roll buildtools/third_party/libunwind/trunk/ 44ea7aba6..557b51a0c (6 commits)

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libunwind.git/+log/44ea7aba6a34..557b51a0ccab

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

Change-Id: I64bf18613fe5a5f9d6a6a1180371fb7b3262c579
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/85726
Reviewed-by: Hui Yingst <nigi@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index c89163e..b7e4bb2 100644
--- a/DEPS
+++ b/DEPS
@@ -103,7 +103,7 @@
   # 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': '44ea7aba6a34a9250e7793418d83f209a480caf4',
+  'libunwind_revision': '557b51a0ccab9b3dbce61bdd57aa5f7d5c7c6206',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling markupsafe
   # and whatever else without interference from each other.