These hooks are maintained in other projects. Add a script to automate
their import so people don't send us changes directly, and we can try to
steer them to the correct place.
Change-Id: Iac0bdb3aae84dda43a1600e73107555b513ce82b
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/422177
Commit-Queue: Mike Frysinger <vapier@google.com>
Tested-by: Mike Frysinger <vapier@google.com>
Reviewed-by: Josip Sokcevic <sokcevic@google.com>
