fips: Add a -v/--verbose flag.

fips: Add a -v/--verbose flag.

The only real purpose imagined for this for now is to be able to
verify that fips is actually doing something, (for example, if a
program renders less than 60 frames and exits then previous fips would
exit silently).

The --verbose flag will be useful with the upcoming test suite and its
short-lived programs.