Roll third_party/libunwind/src/ fc505746f..419b03c0b (2 commits)

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libunwind.git/+log/fc505746f02c..419b03c0b8f2

Created with:
  roll-dep third_party/libunwind/src

Change-Id: I48a0127b2a20db027e05751255465a9328d0c5e9
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/118012
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Auto-Submit: Andy Phan <andyphan@chromium.org>
diff --git a/DEPS b/DEPS
index a5ce26b..ff7e8a5 100644
--- a/DEPS
+++ b/DEPS
@@ -147,7 +147,7 @@
   # 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': 'fc505746f02c927d792bdeb328307e0e87500342',
+  'libunwind_revision': '419b03c0b8f20d6da9ddcb0d661a94a97cdd7dad',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling markupsafe
   # and whatever else without interference from each other.