Automated submodule update: FBGEMM (#47071)
Summary:
This is an automated pull request to update the first-party submodule for [pytorch/FBGEMM](https://github.com/pytorch/FBGEMM).
New submodule commit: https://github.com/pytorch/FBGEMM/commit/39d5addbff3c942e3c2c97b30c46eed167737b31
Pull Request resolved: https://github.com/pytorch/pytorch/pull/47071
Test Plan: Ensure that CI jobs succeed on GitHub before landing.
Reviewed By: albanD
Differential Revision: D24628407
fbshipit-source-id: 9b636f66b92e5853cafd521e704996ebc2faa954
