bisect.jpl: add stage to check failing boot
bisect.jpl: add stage to check failing boot

Add "Check fail" stage to build and test the git revision given as
"bad".  This is to reduce the chances of false positive.

Signed-off-by: Guillaume Tucker <e7e20b7c30f19d4ca6b81319ef81bf200369d137@collabora.com>

kernelci/lava-ci-staging,kernelci/lava-ci-staging,kernelci/lava-ci-staging