pytorch

ec7f1494 - [OSS] Update README.md -- Explain more complex arguments and functionalities

[OSS] Update README.md -- Explain more complex arguments and functionalities Summary: Update `README.md` for oss to explain the usage of `--run` `--export` `--summary` Test Plan: Test locally. Reviewed By: malfet Differential Revision: D23431508 fbshipit-source-id: 368b8dd8cd5099f39c7f5bc985203c417bf7af39