[llvm] Allow the dumping of .dwo files contents to show up when dumping an e… (PR #66726)

[Alexander Yermolovich via llvm-commits]

ayermolo wrote:

> > How do you specify to output DIE at an offset for specific non-skeleton unit?
> 
> Currently you can just use "--debug-info=" and you might see multiple DIEs from multiple .dwo files. I can add a ---dwo-id option to allow only dumping a specific .dwo file.

right. That is what I was asking. Without it, there will be multiple DIEs being outputted for the same offset.

Not sure a flag entry is necessary.  Can we just re-use --dwo
--dwo --> outputs for all non-skeleton
--dwo=<dwo id> --> for specific ones


https://github.com/llvm/llvm-project/pull/66726