Fix restoring from snapshot more than once in a single run (bz #1531048)
CVE-2017-16845: ps2: information leakage via post_load (bz #1514150)
CVE-2017-17381: virtio: divide by zero exception (bz #1520785)
CVE-2018-5683: Out-of-bounds read in vga_draw_text (bz #1534672)
CVE-2018-7550: multiboot OOB access while loading kernel image (bz #1549799)
CVE-2018-7858 cirrus: OOB access when updating vga display (bz #1553404)
CVE-2018-11806: slirp: heap buffer overflow while reassembling fragmented datagrams (bz #1586249)
CVE-2018-12617: qemu-guest-agent: Integer overflow causes segmentation fault in qmp_guest_file_read (bz #1594055)
CVE-2017-15119 nbd: DoS via large option request (bz #1518238)
CVE-2017-15118 nbd: buffer overflow in export name (bz #1518235)
Rebase to qemu 2.10.2