lisa._kmod: Use target.pull(as_root=True) when necessary
FIX
Pull root-owned files using as_root=True. This will ensure that pulling works, even in cases where the server is not running as root (SSH sometimes, adb almost always unless adb root was used).
Instead, the file will be copied to a temp location, its permission changed (chmod runs with su or sudo so this can succeed even when the daemon is not running as root) and then the temporary file pulled.