systemd: fix -dbg package with multilib

When libdir isn't /lib the files that are in nonarch_base_libdir were being left
out of the -dbg package.

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
util-linux: fix systemd service in multilib

Use ${PN} when specifing service files so that they continue to get packaged
with multilib.

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>