Updating submodules
Updating submodules

Summary:
GitHub commits:

https://github.com/facebook/fb303/commit/3e82c5fbfb09124d574e4d2325efce63e917d569
https://github.com/facebook/fbzmq/commit/5da20e87431dcde537e5f99744bd0199735f7f3f
https://github.com/facebook/proxygen/commit/a9385992720c8b7e7fcf3a13bebb47e2a0c9d7c7
https://github.com/facebook/watchman/commit/f42e03e6ceb76a7ba3fc23dcc912d2560f2562a0
https://github.com/facebookexperimental/rust-shed/commit/150d64c2fea4ddb9877928cbb6d6198fef812e99
https://github.com/facebookexternal/stl_tasks/commit/bef37d400c2953961c9d656399292a35cff07a11
https://github.com/facebookincubator/fizz/commit/91da8f835dcf2b018899dd6cd5ffeca7db508f45

Reviewed By: yns88

fbshipit-source-id: 657fb598ef3733fb3f878131a868b41835c375ba

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