Update kernel header script to include vfio

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

scripts/update-linux-headers.sh

@@ -57,7 +57,7 @@ done
 
 rm -rf "$output/linux-headers/linux"
 mkdir -p "$output/linux-headers/linux"
-for header in kvm.h kvm_para.h vhost.h virtio_config.h virtio_ring.h; do
+for header in kvm.h kvm_para.h vfio.h vhost.h virtio_config.h virtio_ring.h; do
     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
 done
 rm -rf "$output/linux-headers/asm-generic"