[bazel] Add presubmit check to generate bazel/deps.bzl if DEPS changes

This is non-blocking for now. Once it bakes in a while, we can
try getting the CQ to run it as well.

Change-Id: Icc7592a6994d134c19de1c97eef19cf194d69a50
Bug: b/256868303
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/598563
Reviewed-by: Eric Boren <borenet@google.com>
1 file changed