[llvm] [llvm-readobj] Add a reusable LLVMReadobjDriver library (PR #222917)

[James Henderson via llvm-commits]

https://github.com/jh7370 commented:

While I'm not necessarily opposed to moving stuff into a library (if there's a strong reason to do so that isn't already covered by the existing options), I'm a bit concerned that the RFC is being used as the justification, yet nothing in that RFC mentions llvm-readobj or even strongly implies it's going to be modified. I think the RFC needs clarifying as to what the scope of the changes are, as I suspect support for the changes is without being informed about the scope. For example, my reading of it was that it was going to impact clang/lld/opt/llc and not the tools I really care about (llvm-readobj/objdump/nm etc).

https://github.com/llvm/llvm-project/pull/222917