Since we started to use gdebi for install build-dep metapackage that generated by
mk-build-dep, we need to install gdebi on build_deb.sh too.
Fixes #2451
Signed-off-by: Takuya ASADA <syuu@scylladb.com>
Message-Id: <1496819209-30318-1-git-send-email-syuu@scylladb.com>
(cherry picked from commit 7fe63c539a)