qemu-kvm security and bug fix update

[0.12.1.2-2.448.el6_6.2]

• kvm-cirrus-fix-blit-region-check.patch [bz#1170571]
• kvm-cirrus-don-t-overflow-CirrusVGAState-cirrus_bltbuf.patch [bz#1170571]
• Resolves: bz#1170571
  (CVE-2014-8106 qemu-kvm: qemu: cirrus: insufficient blit region checks [rhel-6.6.z])
  [0.12.1.2-2.448.el6_6.1]
• kvm-net-Forbid-dealing-with-packets-when-VM-is-not-run_2.patch [bz#970103]
• kvm-virtio-net-drop-assert-on-vm-stop.patch [bz#970103]
• kvm-migration-set-speed-to-maximum-during-last-stage_2.patch [bz#970103]
• kvm-migration-only-call-append-when-there-is-something_2.patch [bz#970103]
• kvm-migration-Only-call-memmove-when-there-is-anything-t.patch [bz#970103]
• kvm-migration-remove-not-needed-ram_save_remaining-fun_2.patch [bz#970103]
• kvm-migration-move-bandwidth-calculation-to-inside-sta_2.patch [bz#970103]
• kvm-migration-Don-t-calculate-bandwidth-when-last-cycl_2.patch [bz#970103]
• kvm-buffered_flush-return-errors.patch [bz#970103]
• kvm-bandwidth_limit-standarize-in-size_t.patch [bz#970103]
• kvm-fix-bz-1196970.patch [bz#1196970]
• Resolves: bz#1196970
  (Migrate status is failed after migrate_cancel.)
• Resolves: bz#970103
  (Downtime during live migration of busy VM is much higher than migration_downtime in vdsm.conf)