Serialization supports pathlib.Path object for the input argument (#18562)
Summary:
This will allow pathlib.Path object to the torch.load as an input argument.
Fixes #16607
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18562
Differential Revision: D14668255
Pulled By: soumith
fbshipit-source-id: 0ae4f7c210918582912f2d1ef2a98f1ab288c540
