[libunwind][AArch64] Unbreak building with GNU assembler

GNU assembler mandates armv8.5-a for memtag instructions. Maybe
we should remove this restriction in GNU assembler, but let's work
around it for current GNU Binutils releases.

Differential Revision: https://reviews.llvm.org/D146109

GitOrigin-RevId: 5d276380b0b45c3f02ef3c8614c3be95ce1bcb1e
1 file changed
tree: e4063ce8e11db3b226b2a3033f14baa3055926cd
  1. cmake/
  2. docs/
  3. include/
  4. src/
  5. test/
  6. .clang-format
  7. CMakeLists.txt
  8. LICENSE.TXT