add --quick to fm

This is handy for cutting irrelevant tool costs from a CPU profile.

Change-Id: Ib1d5a64a01866333e4e83351571dcb7c282ee9dc
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/252152
Commit-Queue: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed