Reduce ecma_{ref, deref}_object calls while using ecma_builtin_get (#2616)

The following stucture was highly frequented in the code base:

 - Get a builtin object // This operation increases the reference count of the object
 - Use it for create a new object
 - Deref the builtin object

After a builtin has been instantiated there is always at least one reference to "keep it alive",
so increase/decrease the reference count for getting the value only is unnecessary.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

jerry-core/ecma/operations/ecma-objects-arguments.c

@@ -109,8 +109,6 @@ ecma_op_create_arguments_object (ecma_object_t *func_obj_p, /**< callee function
     ext_object_p->u.class_prop.class_id = LIT_MAGIC_STRING_ARGUMENTS_UL;
   }
 
-  ecma_deref_object (prototype_p);
-
   ecma_property_value_t *prop_value_p;
 
   /* 11.a, 11.b */
@@ -182,8 +180,6 @@ ecma_op_create_arguments_object (ecma_object_t *func_obj_p, /**< callee function
                                                      &prop_desc,
                                                      false);
     JERRY_ASSERT (ecma_is_value_true (completion));
-
-    ecma_deref_object (thrower_p);
   }
 
   ecma_string_t *arguments_string_p = ecma_get_magic_string (LIT_MAGIC_STRING_ARGUMENTS);