Updating submodules
Updating submodules

Summary:
GitHub commits:

https://github.com/facebook/fbthrift/commit/55afc7f5b32721cebd876076139c005cd7824a79
https://github.com/facebookincubator/velox/commit/c53c07c702312eac099cdd4e9a91340a0e16ee08

Reviewed By: wittgenst

fbshipit-source-id: 8510a29705bb0b8ae6a09870f59c9b667f24ee1c

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