fm_bot: look for and explain too-late flags

Change-Id: I9746fb5215d449b030ecfde6051fa6a69d2e7556
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/206580
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
1 file changed