Keep weights name unchanged during SsaRewrite (#16932)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16932
During onnxifi transformation net ssa is rewritten. At the last step the weight
names are changed back to what they were before. The diff keeps the weight
names unchanged thru the process.
Reviewed By: yinghai
Differential Revision: D13972597
fbshipit-source-id: 7c29857f788a674edf625c073b345f2b44267b33
