Remove several internal property types for primitive objects. (#1399)

Class and value internal properties are always exists for primitive
types (e.g. Boolean, Regex) so they can be stored right after the
object. This improve property access (since internal properties are
searched by a slow linear algorithm) and reduces memory consumption,
since only 8 byte is allocated for these two properties instead of
16 which is the size of a property pair.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

jerry-core/ecma/operations/ecma-exceptions.c

@@ -92,15 +92,12 @@ ecma_new_standard_error (ecma_standard_error_t error_type) /**< native error typ
   ecma_object_t *prototype_obj_p = ecma_builtin_get (prototype_id);
 
   ecma_object_t *new_error_obj_p = ecma_create_object (prototype_obj_p,
-                                                       false,
-                                                       true,
-                                                       ECMA_OBJECT_TYPE_GENERAL);
+                                                       sizeof (ecma_extended_object_t),
+                                                       ECMA_OBJECT_TYPE_CLASS);
 
   ecma_deref_object (prototype_obj_p);
 
-  ecma_value_t *class_prop_p = ecma_create_internal_property (new_error_obj_p,
-                                                              ECMA_INTERNAL_PROPERTY_CLASS);
-  *class_prop_p = LIT_MAGIC_STRING_ERROR_UL;
+  ((ecma_extended_object_t *) new_error_obj_p)->u.class_prop.class_id = LIT_MAGIC_STRING_ERROR_UL;
 
   return new_error_obj_p;
 } /* ecma_new_standard_error */