Fix: FunctionTemplate::SetPrototypeAttributes broke prototype object

src/macros.py

 # Copyright 2006-2009 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 26 matching lines @@
 const GETTER = 0;
 const SETTER = 1;
 
 # These definitions must match the index of the properties in objects.h.
 const kApiTagOffset                 = 0;
 const kApiPropertyListOffset        = 1;
 const kApiSerialNumberOffset        = 2;
 const kApiConstructorOffset         = 2;
 const kApiPrototypeTemplateOffset   = 5;
 const kApiParentTemplateOffset      = 6;
-const kApiPrototypeAttributesOffset = 15;
+const kApiFlagOffset                = 14;
 
 const NO_HINT     = 0;
 const NUMBER_HINT = 1;
 const STRING_HINT = 2;
 
 const kFunctionTag  = 0;
 const kNewObjectTag = 1;
 
 # For date.js.
 const HoursPerDay      = 24;
 const MinutesPerHour   = 60;
 const SecondsPerMinute = 60;
 const msPerSecond      = 1000;
 const msPerMinute      = 60000;
 const msPerHour        = 3600000;
 const msPerDay         = 86400000;
 const msPerMonth       = 2592000000;
 
 # For apinatives.js
 const kUninitialized = -1;
+const kReadOnlyPrototypeBit = 3;  # For FunctionTemplateInfo, matches objects.h
 
 # Note: kDayZeroInJulianDay = ToJulianDay(1970, 0, 1).
 const kInvalidDate        = 'Invalid Date';
 const kDayZeroInJulianDay = 2440588;
 const kMonthMask          = 0x1e0;
 const kDayMask            = 0x01f;
 const kYearShift          = 9;
 const kMonthShift         = 5;
 
 # Limits for parts of the date, so that we support all the dates that
@@ skipping 93 matching lines @@
 
 # PropertyDescriptor return value indices - must match 
 # PropertyDescriptorIndices in runtime.cc.
 const IS_ACCESSOR_INDEX = 0;
 const VALUE_INDEX = 1;
 const GETTER_INDEX = 2;
 const SETTER_INDEX = 3;
 const WRITABLE_INDEX = 4;
 const ENUMERABLE_INDEX = 5;
 const CONFIGURABLE_INDEX = 6;