Move a couple items into a more common location since they're going to
need to be accessible from source plugins.
(From OE-Core rev: 95ca523949e838850b5afa090ba16f91b8557c12)
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>