Affects sumo since that doesn't have oe-selftest parallelism. thud/master create
these in a different location so don't see the issue.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Since we now have functional buildhistory repository functionality,
generate buildhistory-diff output for builds where its enabled.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>