This failure is one the *user* needs to see, as it may have to do with their
setup, but where they don't need to see a traceback and all, since they're not
developers, so I think SystemExit is appropriate here.
(Bitbake rev: e3cc9bc7b6ef1a2eca78235790a051329bceb9a4)
Signed-off-by: Chris Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>