[lld] [LLD] [ELF] Add support for linker script unary plus operator (PR #121508)

[Peter Smith via llvm-commits]

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

Apologies, I didn't think you were waiting on me. I think an approval from MaskRay is sufficient.

LGTM too.

https://github.com/llvm/llvm-project/pull/121508