[llvm] [SPARC] Add llvm-readobj support, update ELF reloc types and dynamic tags. (PR #137916)

[Fangrui Song via llvm-commits]

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

LGTM. 

Note: the majority of commits do not use a full stop at the end of the subject.

https://github.com/llvm/llvm-project/pull/137916