message: NFC: Add a description to the ODS interface example.
diff: @@ -184,8 +184,15 @@ interface above as:
  ```tablegen
  def ExampleOpInterface : OpInterface<"ExampleOpInterface"> {
  + let description = [{
  + This is an example interface definition.
  + }];
  +
  let methods = [
  - InterfaceMethod<"unsigned", "getNumInputs">,
  + InterfaceMethod<
  + "Get the number of inputs for the current operation.",
  + "unsigned", "getNumInputs"
  + >,
  ];
  }
  ```
  