[bindings] v8_interface.py should support 'any' or 'object' in getter/setter

Source/bindings/tests/idls/core/TestObject.idl

Index: Source/bindings/tests/idls/core/TestObject.idl
diff --git a/Source/bindings/tests/idls/core/TestObject.idl b/Source/bindings/tests/idls/core/TestObject.idl
index 6f0814bbba2b6309380112e0271346ea92583be4..5dd435bfd22f8977827ab3a0839cd2cb75762844 100644
--- a/Source/bindings/tests/idls/core/TestObject.idl
+++ b/Source/bindings/tests/idls/core/TestObject.idl
@@ -475,6 +475,10 @@ interface TestObject {
     static void overloadedStaticMethod(long longArg);
     static void overloadedStaticMethod(long longArg1, long longArg2);
 
+    // Special operations
+    getter any item(unsigned long index);
+    getter object(DOMString name);
+
     // Extended attributes for arguments
     // [Clamp]
     void voidMethodClampUnsignedShortArg([Clamp] unsigned short clampUnsignedShortArg);