Add option to add an extra lib name tag to wheel's short hash

[sgillies]

I've been using this on wheels for my Fiona and Rasterio projects, which may be used together and which have a score of potentially overlapping dependencies. If it's not deemed useful to auditwheel, I understand.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 91.81%. Comparing base (7c3501b) to head (d8aa814).

Files	Patch %	Lines
src/auditwheel/repair.py	50.00%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #503 +/- ## ========================================== - Coverage 91.94% 91.81% -0.14% ========================================== Files 20 20 Lines 1266 1270 +4 Branches 279 280 +1 ========================================== + Hits 1164 1166 +2 - Misses 57 58 +1 - Partials 45 46 +1 ```

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