libunwindstack: add missing header for abort()

This is to fix build error like
https://ci.chromium.org/ui/p/chromium/builders/try/android-x86-rel/465071/overview

Bug: 376278210
Change-Id: Ie6097d655739e64dcd0609c540975d1fea86a5b2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/third_party/libunwindstack/+/6022039
Reviewed-by: Mike Wittman <wittman@chromium.org>
3 files changed