Fix help text and option handling

- Add an example to the help text
- Don't silently ignore bad options
- Allow using --trace and document it

Change-Id: Ib173b7c17d08df0e40a7f1ad4bd3bd87961489ac
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/11499
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
2 files changed