Bug#1140492: systemd-cron: the Debian /usr/lib/tmpfiles.d/systemd-cron.conf is overwrite upstream's /usr/lib/tmpfiles.d/systemd-cron.conf

[Alexandre Detiste]

Package: systemd-cron
Version: 2.8.1-2
Severity: normal

Hi,

When I set-up a /usr/lib/tmpfiles.d/systemd-cron.conf
I did not realized that upstream already provided one
whit this contents:

```
f /dev/shm/systemd-cron.loadavg_dam    0644 root root
f /dev/shm/systemd-cron.throttle_group 0644 root root
```

Instead of patching/appending to the upstream one;
it could be better to include the one Debian line upstream.

```
z /usr/libexec/systemd-cron/crontab_setgid 2755 root crontab
```