do_cleansstate wasn't cleaning do_populate_lic sstate objects in the
native/cross case since the wildcard path entry wasn't being cleared
at the same time as the path extra prefix. Fix by clearing it at the
same time.
(From OE-Core rev: af72c507f5e20acf64b7431cee989af9908ef199)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>