suppress errors in `thrift/lib/py3`
suppress errors in `thrift/lib/py3`

Differential Revision: D34341264

fbshipit-source-id: 49d458ebb31e488b22b6d48d9821e6278db089eb

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