Use compile time cudnn version if linking with it statically (#44402)
Summary:
This should prevent torch_python from linking the entire cudnn library statically just to query its version
Pull Request resolved: https://github.com/pytorch/pytorch/pull/44402
Reviewed By: seemethere
Differential Revision: D23602720
Pulled By: malfet
fbshipit-source-id: 185b15b789bd48b1df178120801d140ea54ba569
