OpenEmbedded "poky" with some sysmocom specific modifications. Mostly used only up to sysmocom release 201310, but the "pyro" branch is still used for 201705
The IDU is powerful enough to run the journald. This gives us
some convenienance to have additional output from our services
and we can query them at a later point in time.
This will only be useful for systems that are re-installed
from scratch.
Fixes: SYS#892