Add possibility to configure 'prototype' property via FunctionTemplate

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 4d1f68dac3922d98fd3908448b1dfc86117c4927..d1df8bafcbc5277cb3e1a6ffdc2eebfe5ab39d3c 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6786,6 +6786,7 @@ class FunctionTemplateInfo: public TemplateInfo {
   DECL_ACCESSORS(instance_call_handler, Object)
   DECL_ACCESSORS(access_check_info, Object)
   DECL_ACCESSORS(flag, Smi)
+  DECL_ACCESSORS(prototype_attributes, Smi)
 
   // Following properties use flag bits.
   DECL_BOOLEAN_ACCESSORS(hidden_prototype)
@@ -6825,7 +6826,8 @@ class FunctionTemplateInfo: public TemplateInfo {
   static const int kAccessCheckInfoOffset =
       kInstanceCallHandlerOffset + kPointerSize;
   static const int kFlagOffset = kAccessCheckInfoOffset + kPointerSize;
-  static const int kSize = kFlagOffset + kPointerSize;
+  static const int kPrototypeAttributesOffset = kFlagOffset + kPointerSize;
+  static const int kSize = kPrototypeAttributesOffset + kPointerSize;
 
  private:
   // Bit position in the flag, from least significant bit position.