SUSE-SU-2020:3038-1 Security update for libvirt

This update for libvirt fixes the following issues: - CVE-2020-15708: Added a note to libvirtd.conf about polkit auth in SUSE distros bsc1174955. - CVE-2020-25637: Fixed a double free in qemuAgentGetInterfaces bsc1177155. - libxl: Fixed lock manager lock ordering bsc1171701...