Ubuntu build

[Dirk Hohndel]

We seem to have builds for Ubuntu right now that complete (I just
kicked off new test builds for all the platforms). Downloading the latest
rsult of that build here on Bonaire takes a little bit, not sure I'll get
to test it before heading out to collect more data in a few minutes, but
if others on the supported versions (xenial, zesty, and artful) wouldn't
mind testing and letting us know what works and what doesn't... that would
be very welcome.

/D