The way that we have things broken down currently allows for some
combinations of vendor or CPU to not be built.  To fix this, create a
new catch-all job that excludes everything we've built elsewhere.  For
the sake of simplicity we are allowing for the possibility of some
overlap between the vendor-based jobs and the CPU-based jobs.  While
we're in here, make a failed build provide the summary of failure.

Signed-off-by: Tom Rini <trini@konsulko.com>