Add missing systemctl policy

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
init: allow init to halt and reboot the system

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
locallogin: allow writing to systemd logind pipes

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>