Updated rotation tests

These were generated with reference.warn files that have since been
changed to version the reference warnings with precision. They weren't
updated at the same time as the others, because nobody thought to
check that we included the rotation test directory in all the list of
things the perl script knows about (which has since been made work
better). Jenkins frets about this a bit, too.

Also added .gitignore entry for some rotation-specific log files that
are written. These clutter the git status output otherwise.

Change-Id: Ib2ce6a812860336d027630f9558184fa66f96174