Updating submodules
Updating submodules

Summary:
GitHub commits:

https://github.com/facebook/folly/commit/55dfcb0354bc7659b8816602e64830cc2d407e5f

Reviewed By: yns88

fbshipit-source-id: 5592f5e892351ecfba606be7bfdd562ead90513c

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift