Add support for [NoInterfaceObject] extended attribute to bindings generator

Source/modules/mediastream/RTCDTMFSender.idl

 /*
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 [
+    NoInterfaceObject,
     Conditional=MEDIA_STREAM,
     ActiveDOMObject,
     EventTarget
 ] interface RTCDTMFSender {
     readonly attribute boolean canInsertDTMF;
     readonly attribute MediaStreamTrack track;
     readonly attribute DOMString toneBuffer;
     readonly attribute long duration;
     readonly attribute long interToneGap;
 
     [RaisesException] void insertDTMF(DOMString tones, optional long duration, optional long interToneGap);
 
     attribute EventListener ontonechange;
 
     // EventTarget interface
     void addEventListener(DOMString type,
                           EventListener listener,
                           optional boolean useCapture);
     void removeEventListener(DOMString type,
                              EventListener listener,
                              optional boolean useCapture);
     [RaisesException] boolean dispatchEvent(Event event);
 };