plug caffe2 into jit (#16331)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16331
Temporary measure to enable caffe2 ops in pytorch
Reviewed By: smessmer
Differential Revision: D13740752
fbshipit-source-id: 2d9383574d42ce84ee471aba32eeb4f5a0cc7a4c
