[lld] [llvm] [lld][AArch64][Build Attributes] Add support for converting AArch64 Build Attributes to GNU Properties (PR #131990)

[Oliver Stannard via llvm-commits]

https://github.com/ostannard commented:

This is missing tests for:
* The warnings for invalid attributes
* Mixing GNU properties with build attributes, both within one object file and as different input files
* The effect of build attributes on a non-partial link. There are probably existing tests for PAC/BTI/GCS/pauthabi which you could extend to check that they get enabled by build attributes as well as GNU properties

https://github.com/llvm/llvm-project/pull/131990