Fix --no-color option to parserTests and dumpGrepper.

Optimist was passing in an odd array which confused Util.setColorFlags()
since we were telling it that 'color' was a boolean option, and then giving
it a non-boolean default value ('auto').  When we don't lie to optimist,
everything works again.  (And jenkins' output for parserTests looks nice.)

Change-Id: Ic606f68da7be90ffee13036f4d97eac3603e510f
Merge "Fix --no-color option to parserTests and dumpGrepper."