Updating submodules
Updating submodules

Summary:
GitHub commits:

https://github.com/facebook/folly/commit/24759fc8ac0f99af27e6d8a6db45cd9c838142c6
https://github.com/facebookincubator/velox/commit/d6bfa3dec7c723657b4a5e4073a1a275907c2c04

Reviewed By: jurajh-fb

fbshipit-source-id: cc0635d2b9af4807ceac4a8027adcc499b072450

facebook/wangle,facebook/wangle,facebook/wangle