qemu-kvm security update

[0.12.1.2-2.503.el6_9.3]

• kvm-cirrus-avoid-write-only-variables.patch [bz#1444377 bz#1444379]
• kvm-cirrus-stop-passing-around-dst-pointers-in-the-blitt.patch [bz#1444377 bz#1444379]
• kvm-cirrus-stop-passing-around-src-pointers-in-the-blitt.patch [bz#1444377 bz#1444379]
• kvm-cirrus-fix-off-by-one-in-cirrus_bitblt_rop_bkwd_tran.patch [bz#1444377 bz#1444379]
• kvm-cirrus-fix-PUTPIXEL-macro.patch [bz#1444377 bz#1444379]
• Resolves: bz#1444377
  (CVE-2017-7980 qemu-kvm: Qemu: display: cirrus: OOB r/w access issues in bitblt routines [rhel-6.9.z])
• Resolves: bz#1444379
  (CVE-2017-7980 qemu-kvm-rhev: Qemu: display: cirrus: OOB r/w access issues in bitblt routines [rhel-6.9.z])
  [0.12.1.2-2.503.el6_9.2]
• kvm-fix-cirrus_vga-fix-OOB-read-case-qemu-Segmentation-f.patch [bz#1443447 bz#1443449]
• kvm-cirrus-vnc-zap-bitblit-support-from-console-code.patch [bz#1443447 bz#1443449]
• Resolves: bz#1443447
  (CVE-2017-7718 qemu-kvm: Qemu: display: cirrus: OOB read access issue [rhel-6.9.z])
• Resolves: bz#1443449
  (CVE-2017-7718 qemu-kvm-rhev: Qemu: display: cirrus: OOB read access issue [rhel-6.9.z])
• Resolves: bz#1447544
  (CVE-2016-9603 qemu-kvm-rhev: Qemu: cirrus: heap buffer overflow via vnc connection [rhel-6.9.z] )
• Resolves: bz#1447540
  (CVE-2016-9603 qemu-kvm: Qemu: cirrus: heap buffer overflow via vnc connection [rhel-6.9.z])
  [0.12.1.2-2.503.el6_9.1]
• kvm-vns-tls-don-t-use-depricated-gnutls-functions.patch [bz#1428750]
• kvm-vnc-apply-display-size-limits.patch [bz#1400438 bz#1425943]
• Resolves: bz#1400438
  (qemu-kvm coredump in vnc_refresh_server_surface [rhel-6.9.z])
• Resolves: bz#1425943
  (CVE-2017-2633 qemu-kvm-rhev: Qemu: VNC: memory corruption due to unchecked resolution limit [rhel-6.9.z])
• Resolves: bz#1428750
  (Fails to build in brew)