Security update for qemu

Open Source Vulnerabilities SUSE-SU-2019:0489-1

This update for qemu fixes the following issues: Security issues fixed: - CVE-2019-6778: Fixed a heap buffer overflow issue in the SLiRP networking implementation (bsc#1123156). - CVE-2018-16872: Fixed a host security vulnerability related to handling symlinks in usb-mtp (bsc#1119493). - CVE-2018-19489: Fixed a denial of service vulnerability in virtfs (bsc#1117275). - CVE-2018-19364: Fixed a use-after-free if the virtfs interface resulting in a denial of service (bsc#1116717). - CVE-2018-7858: Fixed a denial of service which could occur while updating the VGA display, after guest has adjusted the display dimensions (bsc#1084604). - CVE-2017-13673: Fixed a denial of service in the cpu_physical_memory_snapshot_get_dirty function. - CVE-2017-13672: Fixed a denial of service via vectors involving display update. Non-security issues fixed: - Fixed bad guest time after migration (bsc#1113231).