Update TensorPipe submodule (#42225)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/42225
Main changes:
- Consolidated CMake files to have a single entry point, rather than having a specialized one for PyTorch.
- Changed the way the preprocessor flags are provided, and changed their name.
There were a few instances in PyTorch's CMake files where we were directly adding TensorPipe's source directory as an include path, which however doesn't contain the auto-generated header we now added. We fix that by adding the `tensorpipe` CMake target as a dependency, so that the include paths defined by TensorPipe are used, which contain that auto-generated header.
I'm turning off SHM and CMA for now because they have never been covered by the CI. I'll enable them in a separate PR so that if they turn out to be flaky we can revert that change without reverting this one.
Test Plan: CircleCI is all green.
Reviewed By: beauby
Differential Revision: D22812445
fbshipit-source-id: e6d824bb28f5afe75fd765de0430968174f3531f
