Updating submodules
Summary:
GitHub commits:
https://github.com/facebookincubator/katran/commit/cfdf778eaf3c362150d8dd8fe3cd43653cc4a3e1
https://github.com/pytorch/fbgemm/commit/7f55d6c14fb8ff2b0b03ddf9c4166bd052460fec
Test Plan: n/a
Reviewed By: yns88
fbshipit-source-id: 2523bce9933cb27b7a02da1650d7ad6f05b0ff30
