Add missing visibility to Bazel rule

Change-Id: I283a97bf1ef6bc7e84fe303af8ad897e94adc02d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/846941
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Kaylee Lubick <kjlubick@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
1 file changed