Security update for systemd (important)

This update for systemd fixes the following issues:

This security issue was fixed:

• CVE-2016-10156: Fix permissions set on permanent timer timestamp files,
  preventing local unprivileged users from escalating privileges
  (bsc#1020601).

These non-security issues were fixed:

• Fix permission set on /var/lib/systemd/linger/*
• install: follow config_path symlink (#3362)
• install: fix disable when /etc/systemd/system is a symlink (bsc#1014560)
• run: make --slice= work in conjunction with --scope (bsc#1014566)
• core: don’t dispatch load queue when setting Slice= for transient units
• systemctl: remove duplicate entries showed by list-dependencies (#5049)
  (bsc#1012266)
• rule: don’t automatically online standby memory on s390x (bsc#997682)