Remove 'util-linux' from DEPENDS so that we don't have the following circular
dependency issue.
systemd <--> util-linux
This dependency was first introduced into the recipe without saying any reason
about it. After checking the source files in systemd, I can guess that the
reason might be udev making use of libblkid. However, we actually have
./src/udev/udev-builtin-blkid.c. So this dependency is not necessary and could
be safely removed.
