Set acl-dir in projects.yaml.

acl-dir is a new expected default in projects.yaml. Set it in
review.o.o's projects.yaml and review-dev's projects.yaml to allow the
manage-projects script to run properly.

Change-Id: I4e40006f07f62a03dedeb10bc7a0f44cb8bc42e2
Reviewed-on: https://review.openstack.org/23746
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Approved: James E. Blair <corvus@inaugust.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins