If the vardeps flag is not None, we now silence the warnings about
non-literal usage for that variable.
(Bitbake rev: e724b9f417d1baf898f5afc6376c73c1a2ad8db9)
Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>