Make thrift-generated dyn async traits future compatible
Make thrift-generated dyn async traits future compatible

Reviewed By: zertosh

Differential Revision: D29979939

fbshipit-source-id: 3e6e976181bfcf35ed453ae681baeb76a634ddda

xuorig/relay,wincent/relay,wincent/relay,voideanvalue/relay,kassens/relay,facebook/relay,facebook/relay,josephsavona/relay,josephsavona/relay,facebook/relay,kassens/relay,kassens/relay,wincent/relay,voideanvalue/relay,voideanvalue/relay,facebook/relay,xuorig/relay,xuorig/relay,wincent/relay,kassens/relay,voideanvalue/relay,wincent/relay,kassens/relay,xuorig/relay,xuorig/relay,kassens/relay,voideanvalue/relay,facebook/relay,wincent/relay,facebook/relay,xuorig/relay,josephsavona/relay,voideanvalue/relay