Accept "Fix: " as a bug line am: e745062e33

Original change: https://android-review.googlesource.com/c/platform/tools/repohooks/+/3295916

Change-Id: I9507260024ec8a1acc27c4a1b519a85d4d054061
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>