[llvm] [llvm-readobj] Support --string-table for COFF (PR #141552)

[Martin Storsjö via llvm-commits]

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

This LGTM - this now uses preexisting input binaries for testing the other cases; this looks good enough for this feature IMO.

Extending yaml2obj to be able to synthesize the string table would be a nice addition, but I wouldn't block this feature on doing that, as we have decent coverage with those existing binaries.

https://github.com/llvm/llvm-project/pull/141552