With the "ABI safe" recipes, we've been excluding those from signatures. This
is fine in the general case but in the specific case of image recipes it breaks.
A good test case is the interfaces file. Editting this causes init-ifupdown
to rebuild but not an image containing it (e.g. core-image-minimal).
We need to ensure the checksums are added to the image recipes and this change
does that.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
