pytorch

dff8165d - ONNX Export Flatten operator

ONNX Export Flatten operator Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/16240 Reviewed By: bddppq Differential Revision: D13800025 Pulled By: houseroad fbshipit-source-id: ae4c5e42026477b28ffd44eda2438d93936ea510