pytorch

bc539845 - Enable ROCm multi-gpu with Gloo

Enable ROCm multi-gpu with Gloo Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/18640 Differential Revision: D15185822 Pulled By: bddppq fbshipit-source-id: 1b49ab3fb0f251cfc7ef3ddd62033ae0065a4ec3