project.config: add revert permissions to boringssl refs/* Bug: b/396344378 Change-Id: Icfa362467a895c09feb4ad39099f364ade81ce27 Reviewed-on: https://boringssl-review.googlesource.com/c/All-Projects/+/76827 Reviewed-by: Josip Sokcevic <sokcevic@google.com>