message: Add print operator for BufferObjectBinding.
diff: @@ -606,6 +606,13 @@ io::ostream& operator<<(io::ostream& out, RenderPassParams const& params) {
  return out;
  }
  +io::ostream& operator<<(io::ostream& out, BufferObjectBinding wrap) {
  + switch (wrap) {
  + CASE(BufferObjectBinding, VERTEX)
  + }
  + return out;
  +}
  +
  #undef CASE
  #endif // !NDEBUG
  