OBS: add jenkins job to check for new distros

Add a new jenkins job to notify us about new versions of Debian,
Raspbian and Ubuntu becoming available in the openSUSE OBS. This allows
us to consistently follow along and make the repositories available in
the Osmocom OBS. I've decided to check the openSUSE OBS instead of
checking somewhere upstream, because it takes time between a new
release of a distribution and the version becoming available in
openSUSE OBS, and we have another job that syncs the configuration with
that OBS instance.

Related: OS#6163
Change-Id: I0abc49a95197da55f7d83ed4fd1c4ebb6bd14b1e
4 files changed