updates for qemu 1.4.0
qemu 1.4 : fix virtio-balloon-fix-query.patch

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
update to 1.4.0rc2
update to 1.4.0 final
update to latest backup patches
bump version to 1.4-4

There are some parameter name changes in the backup API.
update backup patches to v5
bump version to 1.4-5
set default cpu model to kvm64

To avoid problems with windows activation.
use g_strerror instead of strerror

Because strerror is not thread safe.