To fix caffe2 model with Copy OP cannot export to onnx model (#37144)
Summary:
To fix caffe2 model with Copy OP cannot export to onnx model
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37144
Reviewed By: houseroad
Differential Revision: D21252421
Pulled By: yinghai
fbshipit-source-id: 4f1077188f36b0691d199e418880bbb27f11032d
