There should be a warning or error if the LICENSE field in a recipe contains space separated entries. It is not clear whether the all licenses apply or any of the licenses can be used.
Related to 6765.
Merged at, http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=3ef9f83ab7040684cbc62b276a2598cce55e6c8d
Verified in commit df0672b038e6942c97d266af9ca175a06f2b0423