fix(dracut.spec): handle error in %post

If the system is read-only, the %post script fails and exits with error.

Issue detected on the IBS after the build of ae26ad5 failed.

Fixes ae26ad5

suse/dracut.spec

@@ -223,7 +223,7 @@ if [ -L /var/run ] && [ -f /etc/dracut.conf.d/05-convertfs.conf ]; then
 fi
 
 # remove obsolete legacy fillup template for /etc/sysconfig/kernel
-[ -f /var/adm/fillup-templates/sysconfig.kernel-mkinitrd ] && rm -f /var/adm/fillup-templates/sysconfig.kernel-mkinitrd
+[ -f /var/adm/fillup-templates/sysconfig.kernel-mkinitrd ] && rm -f /var/adm/fillup-templates/sysconfig.kernel-mkinitrd || :
 
 %{?regenerate_initrd_post}