If no value is set for DISTRO the defaultsetup policy is used, reflect this
in the UI by having defaultsetup selected in the Distribution combo when no
other DISTRO is set.
(Bitbake rev: 126267c545ede65042959d134ea75c0345577747)
Signed-off-by: Joshua Lock <josh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>