Updating submodules
Updating submodules

Summary:
GitHub commits:

https://github.com/facebook/folly/commit/a3960b9f370537dcefcab5094f94afb2c101b429
https://github.com/facebook/litho/commit/d23a9406659f27fa9df25d02ae1097a975973bb8
https://github.com/facebookincubator/katran/commit/8e68514bf6b12e1f1dac94e706b189408ea9c553

Reviewed By: bigfootjon

fbshipit-source-id: 97c755ef44b4cee226ce12d05b45617430062982

facebook/wangle,facebook/wangle,facebook/wangle