tools: always use a trailing comma in arrays

This makes sure all arrays in /lib end with a comma to prevent future churn. Other options are set as before to minimize the change.

Something like this just came up in a review and I guess it is indeed a good idea to slowly migrate to a code base that has trailing commas.

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines