buildpackages: use install-deps.sh from local clone if available
Fixes:
# GNU Library Public License for more details.
#
function install_deps() {
+ if [ ! -f install-deps.sh ]; then
git archive --remote=git://git.ceph.com/ceph.git master install-deps.sh | tar -xvf -
+ fi
#
# drop the following hack when trusty is not supported anymore
# there is no other way as long as we maintain a debian directory that tries
