Allow systemd-logind to write shutdown files in /run

The current shutdown command implemented in systemctl asks systemd-logind to shutdown. systemd-logind is prevented by apparmor to shutdown: The AppArmor profile does not allowing creation of nologin, utmp and scheduled files. When systemd-logind fails, systemctl writes a warning message in the console, and uses a fallback code to shutdown. This patch allows systemd-logind to create those files for a clean shutdown.

Apertis: https://phabricator.apertis.org/T4570 Signed-off-by: Frédéric Dalleau frederic.dalleau@collabora.com