This means that anyone firing an event can get a systemexit and result in
their process exiting, which isn't ideal, but behaves the way it used to (in
particular, ensures that a sanity check failure will halt the build). This
should be revisited in the future.
(Bitbake rev: d6a0ffdd583be3df734171d7e91d334f798a79ce)
Signed-off-by: Chris Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>