[lld] [lld][ELF][LoongArch] Support relaxing R_LARCH_CALL36 (PR #127312)

[WÁNG Xuěruì via llvm-commits]

xen0n wrote:

Sorry again for the long pause of my LLVM work; I didn't know #123576 was posted long before this, until today morning when @MaskRay pointed me to it.

Given that PR has more diverse test cases, and the fact that this PR has at least one issue to be fixed, I'm going to close this PR and review that one instead.

https://github.com/llvm/llvm-project/pull/127312