Updating submodules
Updating submodules

Summary:
GitHub commits:

https://github.com/facebook/folly/commit/4871a28a02d89391894c4af6434d0efa976e18b8
https://github.com/facebook/litho/commit/a9d49584ce37e6f9a39c0b7280e1d453a5fb371b

Reviewed By: bigfootjon

fbshipit-source-id: 54cc4b19e6878189f09997ad34cfba79513c3037

facebook/watchman,facebook/watchman,facebook/watchman,facebook/watchman,facebook/watchman,facebook/watchman,facebook/watchman,facebook/watchman,facebook/watchman