gen_tasks.go: Add --builder_name_schema flag

BUG=skia:6070

Change-Id: I66ac3057f7863f822445d5163e54ca3b11755068
Reviewed-on: https://skia-review.googlesource.com/8107
Reviewed-by: Eric Boren <borenet@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
1 file changed