update-rc.d: Include updated-rc.d in DEPENDS

update-rc.d: Include updated-rc.d in DEPENDS

If you build a user of updated-rc.d like udev, as things stand currently
nothing pulls in updated-rc.d but there is a dependency added on the
package at do_package time. This can lead to errors during rootfs
construction either with licensing. The fact its a RRECOMMEND means
the image are not deterministic.

A particularly good test case for reproducing this is:

MACHINE=A bitbake core-image-minimal
MACHINE=B bitbake core-image-minimal-initramfs

and since the second machine can find the package but not the license
manifest, a failure will result.

Extending the DEPENDS is the easy way to fix the issues.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>