Automated submodule update: FBGEMM (#64149)

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/f6dfed87a10ed5729bce83e98788e437a94cbda0

Pull Request resolved: https://github.com/pytorch/pytorch/pull/64149

Test Plan: Ensure that CI jobs succeed on GitHub before landing.

Reviewed By: jspark1105

Differential Revision: D30632209

fbshipit-source-id: aa1cebaf50169c3a93dbcb994fa47e29d6b6a0d7

diff --git a/third_party/fbgemm b/third_party/fbgemm
index 9939bac..9f4078a 160000 (submodule)
--- a/third_party/fbgemm
+++ b/third_party/fbgemm
@@ -1 +1 @@
-Subproject commit 9939bac9defab4d18fb7fdded7e1a76c0c2b49b4
+Subproject commit 9f4078a7bb92b88cdcfc913398ffade158160c91