Allow specific ubuntu distro to be chosen when calling script
Allow specific ubuntu distro to be chosen when calling script

There are some issues with the latest ubuntu 16.04 and the v1.0 stable
release.  We could have similar issues going forward so best to give
ourselves the flexibility to choose our release.

The default will still be :latest

Change-Id: Ifa33ce4ee1c51a5d80a5892d6ed1f1e4097734d2
Signed-off-by: Andrew Geissler <c46de238cd554860f0bd4010b1729f1323facd9c@us.ibm.com>

openbmc/openbmc-build-scripts,openbmc/openbmc-build-scripts