Updating submodules
Updating submodules

Summary:
GitHub commits:

https://github.com/facebook/fb303/commit/18218334c200045ecb4e4fa642eb25278e3d8e38
https://github.com/facebook/fbthrift/commit/33250c6cbd251e6ee46f847843ec6b72e0bd4afa
https://github.com/facebook/fbzmq/commit/9f79a63bec7fc6fd3e26047ab7c935eec15d7f14
https://github.com/facebook/litho/commit/3df393f33a57af587617b9332585e2e3170137c2
https://github.com/facebook/watchman/commit/8e3651348f9598fe85534a988525f57fb9945a51
https://github.com/facebookexperimental/rust-shed/commit/a627a05ed96cbd3bbd5a8fd1a0e6d3046c4ec5fb
https://github.com/facebookexternal/stl_tasks/commit/ed32f1a77f9dcc869784f4ef1845826e2f55d025
https://github.com/facebookincubator/velox/commit/012b3e0e611cdebd4509104f7cd897b732badf11

Reviewed By: wittgenst

fbshipit-source-id: 14c82001418646c7558ba352b56641ffd1526460

facebook/bistro,facebook/bistro,facebook/bistro,facebook/bistro,facebook/bistro,facebook/bistro