Print CuDNN version correctly. (#19110)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19110
ghimport-source-id: efbaf9b23cb61e7ea65460684778c6eeb38ae28e
Differential Revision: D14874497
Pulled By: ezyang
fbshipit-source-id: ced03576f7598189dd8cce79b3303a5529551f46
