dist/debian: provide prebuilt 3rdparty packages for Ubuntu 16.04
dist/debian: provide prebuilt 3rdparty packages for Ubuntu 16.04

Currently we only offers 14.04 prebuit but we have 16.04 one on s3, so use it.

Signed-off-by: Takuya ASADA <4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>
Message-Id: <1496301544-15251-1-git-send-email-4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>

duarten/scylla,avikivity/scylla,avikivity/scylla,duarten/scylla,duarten/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla