[llvm] [Object] Beginnings of SFrame parser and dumper (PR #147294)

[James Henderson via llvm-commits]

https://github.com/jh7370 commented:

Has GNU readelf's --all been updated to dump sframe too, since it does imply --unwind? If so, we should update to match.

I'm not seeing the changes you said you made for things like `createError`? Did you push the wrong commit or something?

https://github.com/llvm/llvm-project/pull/147294