Several things have happened recently that affect the compare script's ability to do clean comparisons for build change verification.

* The SystemModules.class has even more randomness in it and it currently doesn't look like it can be reliably compared at all.
* The new lib/classlist file may have lines in different order between builds.
* Support comparing the new licensee-src build mode.

By fixing this I'm again able to do a full -testset buildinfra JPRT COMPARE_BUILD build using an empty patch and get a clean result.