caffe2 | MSVS compatibility fixes (#16765)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16765
Code changes required to build caffe2 for windows with toolchain used by FB.
Reviewed By: orionr
Differential Revision: D13953258
fbshipit-source-id: 651823ec9d81ac70e32d4cce5bc2472434104733
