Various bug fixes and improvements.
(From OE-Core rev: 1aa70f441e6cda540699b65a45c0ad71eff5e17c)
Signed-off-by: Maxin B. John <maxin.john@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>