Note onSubmitEditing is invalid with multiline={true}

Summary: Repeat onSubmitEditing is invalid if mutliline is set to true. Closer to the method's documentation.
Closes https://github.com/facebook/react-native/pull/4008

Reviewed By: svcscm

Differential Revision: D2639710

Pulled By: nicklockwood

fb-gh-sync-id: b7a169f0d21ac53f092278bdd32ee2d79779aa14

Libraries/Components/TextInput/TextInput.js

@@ -223,6 +223,7 @@ var TextInput = React.createClass({
     onEndEditing: PropTypes.func,
     /**
      * Callback that is called when the text input's submit button is pressed.
+     * Invalid if multiline={true} is specified.
      */
     onSubmitEditing: PropTypes.func,
     /**