[llvm] Reland "[llvm-readobj] Dump callgraph section info for ELF" (PR #176260)

[James Henderson via llvm-commits]

https://github.com/jh7370 commented:

My apologies for not getting back to this as quickly as I promised - I've had a combination of too many reviews and ill health to deal with.

I've run out of time to review this further today, but there's a bunch of comments to respond to and will pick this back up either tomorrow or early next week, hopefully.

https://github.com/llvm/llvm-project/pull/176260