OpenEmbedded "poky" with some sysmocom specific modifications. Mostly used only up to sysmocom release 201310, but the "pyro" branch is still used for 201705
Disabling the new "binfmt" doesn't work and breaks the build. I have
sent an email to the mailinglist and this might be fixed but at the
same time binfmt is split into a new package anyway. At the same time
we should enable some items we have now switched off. Once we start
to use/stabilize this build we need to check what we need and what the
cost is.