[Toaster] [review-request] michaelw/new-buildbutton-fix-7739

[Michael Wood]

commit cc5ee87f905bbbaa2baf783068da23ef0f68686d
Author: Michael Wood <michael.g.wood at intel.com>
Date:   Thu May 14 17:17:51 2015 +0100

     bitbake: toaster: Fix build button current project race

     Make sure the current project value is set before we check to see 
if the
     project is buildable.

     [YOCTO #7739]

     Signed-off-by: Michael Wood <michael.g.wood at intel.com>