[AMD] Fix some legacy hipify script (#70594)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70594
Pull Request resolved: https://github.com/facebookincubator/gloo/pull/315
Fix some out-dated hipify script:
* python -> python3 (fb internal)
* rocblas return code
* gloo makefile for hip clang
Test Plan: Sandcastle + OSS build
Reviewed By: malfet, shintaro-iwasaki
Differential Revision: D33402839
fbshipit-source-id: 5893039451bcf77bbbb1b88d2e46ae3e39caa154
