[lld] [llvm] [LoongArch] Use R_LARCH_ALIGN with section symbol (PR #84741)

[Fangrui Song via llvm-commits]

MaskRay wrote:

Sorry for the delay. LGTM. (I'd really appreciate that you gave me a bit more time and I might be able to suggest a better code comment and point out the grammatical mistake "not changes" in the test, which is probably not worth changing now).

https://github.com/llvm/llvm-project/pull/84741