[lld] [llvm] [dyndbg][LLD][ELF] Initial LLD support for dynamic debugging (PR #214188)

[Peter Smith via llvm-commits]

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

A few small test nits, but otherwise this looks good to me. I've not got any more significant comments. I'll set approved on my side, but as a LLVM extension I think it ought to have an approval from @MaskRay too.

https://github.com/llvm/llvm-project/pull/214188