When creating label in recipeselectionpage.py, the builder's
configuration may not be ready yet, so create an empty label in
initialization.
(Bitbake rev: e4f22f6242f489afcadac67cc8dd282936b78586)
Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>