Add support for [NoInterfaceObject] extended attribute to bindings generator

Source/modules/webaudio/PannerNode.idl

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 [
+    NoInterfaceObject,
     Conditional=WEB_AUDIO
 ] interface PannerNode : AudioNode {
     // Panning model
     const unsigned short EQUALPOWER = 0;
     const unsigned short HRTF = 1;
     const unsigned short SOUNDFIELD = 2;
 
     // Distance model
     const unsigned short LINEAR_DISTANCE = 0;
     const unsigned short INVERSE_DISTANCE = 1;
@@ skipping 12 matching lines @@
 
     attribute double refDistance;
     attribute double maxDistance;
     attribute double rolloffFactor;
 
     // Directional sound cone
     attribute double coneInnerAngle;
     attribute double coneOuterAngle;
     attribute double coneOuterGain;
 };