Updating submodules
Updating submodules

Summary:
GitHub commits:

https://github.com/facebook/fb303/commit/edeb2a896dbd6ae46d253fe0c0b96a842286c7c0
https://github.com/facebook/fbthrift/commit/42a4a43f961abb3afa335a2b7bb4111ad579549d
https://github.com/facebook/fbzmq/commit/83d5dde12aaebe4c21800691c6d3185b4f7f7b58
https://github.com/facebook/rocksdb/commit/785b804a9a84b53dc96b79fdec22a35c2b571421
https://github.com/facebook/watchman/commit/c2706274f8d8085e5db3d846ba1525f9d361ad93
https://github.com/facebookexperimental/rust-shed/commit/6f01065f5dde93b16a22ac33b363aaec00047247
https://github.com/facebookincubator/velox/commit/c4e238140a384396166f9a728a204efad78653bd

Reviewed By: bigfootjon

fbshipit-source-id: b9d00aad0fcb39d7a61d09d12c7ff587f7e93e49

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