[lld] [lld][ELF] Fix crash when relocations proceed relocated section (PR #156354)

[via llvm-commits]

mykouHW wrote:

> I think the description needs to be clarified. My comment at 156417 could be used. I'll push the change like https://github.com/MaskRay/llvm-project/tree/lld-156354 and merge this for you.

That's great, thank you for your revisions and assistance!

https://github.com/llvm/llvm-project/pull/156354