[image_to_vm.sh]: Recomment virtio instead of cirrus.

BUG=chromium:782190
TEST=manual

Change-Id: I263de0a09797326945062ed7156125a323d2e5dc
Reviewed-on: https://chromium-review.googlesource.com/770095
Commit-Ready: Allen Webb <allenwebb@google.com>
Tested-by: Allen Webb <allenwebb@google.com>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
diff --git a/image_to_vm.sh b/image_to_vm.sh
index e05c3fa..45b54b0 100755
--- a/image_to_vm.sh
+++ b/image_to_vm.sh
@@ -229,7 +229,7 @@
 echo "Created image at ${FLAGS_to}"
 
 echo "If you have qemu-kvm installed, you can start the image by:"
-echo "sudo kvm -m ${DEFAULT_MEM} -vga cirrus -pidfile /tmp/kvm.pid" \
+echo "sudo kvm -m ${DEFAULT_MEM} -vga virtio -pidfile /tmp/kvm.pid" \
   "-net nic,model=virtio -net user,hostfwd=tcp:127.0.0.1:9222-:22 \\"
 echo "-hda ${FLAGS_to}/${DEFAULT_QEMU_IMAGE}"