baseline.py: saving output probability (.npy file)

[Sudipan Saha]

It seems like in baseline.py, when if FLAGS.OOD_detection == 0 output probability (.npy file) is not not saved and when FLAGS.OOD_detection == 1 output probability (.npy file) is saved, but without the _ood extension (i.e., to incorrect directory).

[Xujiang Zhao]

Thanks for pointing out this error, I just fixed it,