[bazel] Add Presubmit to remind devs about adding/deleting files.

Bug: skia:12541
Change-Id: Idc8f9e721dc172d4ff2b4884d36363a882293ee6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/541416
Reviewed-by: John Stiles <johnstiles@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>
1 file changed