(Thrift) fix missing header for uint16_t
(Thrift) fix missing header for uint16_t

Reviewed By: vitaut

Differential Revision: D19418362

fbshipit-source-id: c40450b1fc072e81cce189c11eab7c3d40fb5f58

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift