systemd: 204 -> 206

Signed-off-by: Christopher Larson <kergoth@gmail.com>
Add recipe to set up bind-mounts with copying contents

This is similar to the read only rootfs hook in sysvinit, but for systemd.

Signed-off-by: Christopher Larson <kergoth@gmail.com>
Drop bits that should no longer be necessary with the /var/lib bits

Signed-off-by: Christopher Larson <kergoth@gmail.com>