Add possibility to configure 'prototype' property via FunctionTemplate

src/macros.py

Index: src/macros.py
diff --git a/src/macros.py b/src/macros.py
index 3905659952900409cc8fb17a965d3e8ea0c8a824..05066659438fefe38c058ca8fe27e420e6bca375 100644
--- a/src/macros.py
+++ b/src/macros.py
@@ -38,12 +38,13 @@ 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 kApiTagOffset                 = 0;
+const kApiPropertyListOffset        = 1;
+const kApiSerialNumberOffset        = 2;
+const kApiConstructorOffset         = 2;
+const kApiPrototypeTemplateOffset   = 5;
+const kApiParentTemplateOffset      = 6;
+const kApiPrototypePropertiesOffset = 15;
 
 const NO_HINT     = 0;
 const NUMBER_HINT = 1;