We have been carrying a nastly little patch for kernel-wedge to cope with
the fact we use control.stub.  But it is simpler to just go with the flow
and emit the stub by hand.  Do this in such a way we keep a fake
debian/control.stub such that we will work with either Debian or Ubuntu
kernel-wedge.
Signed-off-by: Andy Whitcroft <apw@canonical.com>