Add support for [NoInterfaceObject] extended attribute to bindings generator

Source/modules/webaudio/OscillatorNode.idl

 /*
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 // OscillatorNode is an audio generator of periodic waveforms.
 [
+    NoInterfaceObject,
     Conditional=WEB_AUDIO
 ] interface OscillatorNode : AudioSourceNode {
 
     // Type constants.
     const unsigned short SINE = 0;
     const unsigned short SQUARE = 1;
     const unsigned short SAWTOOTH = 2;
     const unsigned short TRIANGLE = 3;
     const unsigned short CUSTOM = 4;
 
@@ skipping 12 matching lines @@
 
     void start(double when);
     void stop(double when);
 
     void noteOn(double when);
     void noteOff(double when);
 
     void setWaveTable(WaveTable waveTable);
 
 };