[automerger skipped] Fix special case when appending a visibility rule to...
[automerger skipped] Fix special case when appending a visibility rule to //visibility:private. am: adb18952 -s ours
am skip reason: Change-Id Ibe7e953219e4660c653063e87cb08407a2cb513d with SHA-1 64aeaadd is in history
Change-Id: I4219e0131dc81a2f81617aff9ede171c64b54a01