qemu: add patches to fix lots of CVEs

Patches from Debian and upstream git repo.

Fixes:

 * CVE-2016-6836
 * CVE-2016-7155
 * CVE-2016-7156
 * CVE-2016-7157
 * CVE-2016-7421
 * CVE-2016-7422
 * CVE-2016-7423
 * CVE-2016-7466
 * CVE-2016-8909
 * CVE-2016-8910
 * CVE-2016-9102
 * CVE-2016-9103
 * CVE-2016-9104
 * CVE-2016-9105
 * CVE-2016-9106

cc #20078