[strong] fix strong array, object prototypes

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index c8b8797266aea3df05066a370e2ddca6d88838bd..3e0a6868f3b34a3b2057b5a1d6a2f40825253de4 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -534,7 +534,7 @@ Handle<JSFunction> Genesis::CreateEmptyFunction(Isolate* isolate) {
 
     // Allocate initial strong object map.
     Handle<Map> strong_object_map =
-        Map::Copy(object_function_map, "EmptyStrongObject");
+        Map::Copy(Handle<Map>(object_fun->initial_map()), "EmptyStrongObject");
     strong_object_map->set_is_strong();
     native_context()->set_js_object_strong_map(*strong_object_map);
   }