OPENSUSE-SU-2019:2510-1 Security update for qemu

This update for qemu fixes the following issues: qemu was updated to v3.1.1.1, a stable, bug-fix-only release, which includes 2 fixes we already carry, as well as one additional use- after-free fix in slirp. CVE-2018-20126 bsc1119991, CVE-2019-14378 bsc1143794, and CVE-2019-15890 bsc1149811...