Summary:
This is an automated pull request to update the first-party submodule for [pytorch/tensorpipe](https://github.com/pytorch/tensorpipe).
New submodule commit: 87f7681286
Pull Request resolved: https://github.com/pytorch/pytorch/pull/56495
Test Plan: Ensure that CI jobs succeed on GitHub before landing.
Reviewed By: beauby
Differential Revision: D27886370
fbshipit-source-id: 2b6e2b38412694633517df2b0501e5da9e81656c