SUSE-SU-2020:2237-1 Security update for libvirt

This update for libvirt fixes the following issues: - CVE-2020-14339: Don't leak /dev/mapper/control into QEMU. Use ioctl's to obtain the dependency tree of disks and drop use of libdevmapper. - bsc1161883, bsc1174458 - qemu: Setup emulator thread and cpuset.mems before exec - bsc1171946 - libxl:...