[llvm] [llvm-dwarfdump] pretty-print DW_AT_call_origin reference (PR #71693)

[J. Ryan Stinnett via llvm-commits]

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

Looks great to me, thanks for improving `llvm-dwarfdump` output! 😄 

If you search the DWARF spec for "a reference", it looks like there are various other attributes that could also be given the same treatment as well... No need to do that in this PR though, just passing it along as a potential further improvement.

https://github.com/llvm/llvm-project/pull/71693