Updating submodules
Updating submodules

Summary:
GitHub commits:

https://github.com/facebook/fb303/commit/63af322fc74df71e2adb8b301923f138ed62b535
https://github.com/facebook/fbthrift/commit/557cab1738eac15a00075a62389b50a3b6d900fc
https://github.com/facebook/fbzmq/commit/fb2e3c4257d4c85bd72cd6018ef3394f09e2035d
https://github.com/facebook/rocksdb/commit/cfc57f55b5247e5a6634e76f083cfaca2613d90b
https://github.com/facebook/watchman/commit/c0aa58956d744d8b6d77f4f4115d27fc4b143f42
https://github.com/facebookexperimental/rust-shed/commit/b769f957c3a7c0446b3ee326d4b8c315411b1486
https://github.com/facebookexternal/stl_tasks/commit/399e904b38d316f0d3a2107a7c22c3f300e18530

Reviewed By: yns88

fbshipit-source-id: 6ace0f3a94289f4c4968b45736481c29f23cd3c9

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