Comment 4 for bug 1425619

To make the migration work, you need to:
- Create a qemu-kvm compatible machine type for pc-i440fx-1.5. Lets call it pc-i440fx-1.5-saucy.
- Override cirrus-vga.vgamem_mb to 8mb (instead of 10mb)
- Override virtio-net-pci.romfile to use pxe-virtio.rom (instead of efi-virtio.rom)
- Patch libvirt to translate pc-i440fx-1.5 to pc-i440fx-1.5-saucy if allow_incoming_qemukvm is enabled. (just like with pc-1.0)