SUSE-SU-2018:0920-1 Security update for libvirt

This update for libvirt and virt-manager fixes the following issues: Security issues fixed: - CVE-2017-5715: Fixes for speculative side channel attacks aka 'SpectreAttack' var2 bsc1079869. - CVE-2018-6764: Fixed guest executable code injection via libnssdns.so loaded by libvirtlxc before init...