Conditionally stops checking if generated file are up-to-date
Conditionally stops checking if generated file are up-to-date

Golang changed the way of gzip compression between go1.6.1 and 1.6.1+.
So the gzipped proto.FileDescriptorProto always have diff.
Thus we cannot assume that generated files have the same contents as the
ones regenerated in Travis CI.

tmc/grpc-gateway,ilius/grpc-gateway,improbable-io/grpc-gateway,gengo/grpc-gateway,Lantame/grpc-gateway,Lantame/grpc-gateway,ilius/grpc-gateway,grpc-ecosystem/grpc-gateway,ilius/grpc-gateway,gengo/grpc-gateway,tmc/grpc-gateway,improbable-io/grpc-gateway