Updating submodules
Summary:
GitHub commits:
https://github.com/facebook/fbzmq/commit/612ae995a6109ffaa5f6158775f8dfb83162dd27
https://github.com/facebookincubator/katran/commit/a6f5d4d62122a4f0acc180413db017ab7417d1f9
https://github.com/pytorch/fbgemm/commit/799f6a8c0db643a9eef8ee265b7b160af5c502cd
Test Plan: n/a
Reviewed By: zpao
fbshipit-source-id: 365832bf627e855c0aa15e083a873894368b0cfd
