rfc patch PR32760: find-debuginfo for static libraries

[Frank Ch. Eigler]

Hi -

> [...]
> So the above are all just nitpicks, feel free to make changes or ignore
> them and commit. I'll deal with the new tests/find-debuginfo.at file
> merge conflicts with my patch.

Added some more terminology tweaks as requested and pushed to master.

> Have you done some other testing? Could you find some larger
> static/devel packages in fedora and rebuild them with this new ar
> processing code?

Absolutely, versions of this code have gone through rpmbuilding
-static-bearing packages large and small, observing enlarged
-debugsource RPMs and proper dwarf source-file names.

- FChE