[lld] [lld][ELF] Allow Arm PC-relative relocations in pic or shared library (PR #77304)

[Peter Smith via llvm-commits]

https://github.com/smithp35 approved this pull request.

Thanks for the updates. LGTM. Will be worth leaving some time to see if MaskRay has any additional comments.

https://github.com/llvm/llvm-project/pull/77304