This avoids a common issue where PACKAGECONFIG is emitted as a function in
bitbake -e when the 'python' flag exists. It isn't a python function unless
both 'func' and 'python' are set. This aligns with the behavior of
emit_func_python.
(Bitbake rev: c5e45063cb3ae17bbe3304ea5e712bd76e686c4a)
Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>