smoke test for add_graph (#20007)
Summary:
Do tests with common models from torchvision.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/20007
Differential Revision: D15251754
Pulled By: orionr
fbshipit-source-id: 9dc09bd407b3ccaaa310d2f4a8d53d5a7d12469d
