Unmount filesystem and destroy md before we read the vnode from disk and

package it into a disk image.  Otherwise we end up packaging an unclean
filesystem.

release/scripts/mk-vmimage.sh

@@ -100,9 +100,9 @@ main() {
 	vm_extra_install_ports
 	vm_extra_enable_services
 	vm_extra_pre_umount
+	cleanup
 	vm_create_disk || return 0
 	vm_extra_create_disk
-	cleanup
 
 	return 0
 }