[libunwind] Sync Unwind_AppleExtras.cpp with downstream version

Both had diverged in a few ways, so this brings them both back in sync.

Differential Revision: https://reviews.llvm.org/D148351

GitOrigin-RevId: ca4fb463187ce244d61dc62a8f4e3e01d1872cc2
1 file changed
tree: 20a451c535cc21276f9b722198f6164822b2df07
  1. cmake/
  2. docs/
  3. include/
  4. src/
  5. test/
  6. .clang-format
  7. CMakeLists.txt
  8. LICENSE.TXT