[lld] [llvm] [lld][AArch64][Build Attributes] Add support for AArch64 Build Attributes (PR #142637)

[Peter Smith via llvm-commits]

https://github.com/smithp35 commented:

Just one quick comment on the functional side (mapping PAuth BuildAttributes 0, 1 to an explicit GNU properties of 0, 0).

Will keep looking to see if I can spot anything else.

https://github.com/llvm/llvm-project/pull/142637