[llvm] [llvm-debuginfo-analyzer] Fix a couple of unhandled DWARF situations leading to a crash (PR #137221)

[Carlos Alberto Enciso via llvm-commits]

CarlosAlbertoEnciso wrote:

@jalopezg-git With a minor change on the commit message (removed the stack trace) I have merged your patch. Thanks for fixing those issues.

https://github.com/llvm/llvm-project/pull/137221