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-objects.h

@@ -48,6 +48,7 @@ extern bool ecma_op_object_is_prototype_of (ecma_object_t *, ecma_object_t *);
 extern ecma_collection_header_t * ecma_op_object_get_property_names (ecma_object_t *, bool, bool, bool);
 
 extern lit_magic_string_id_t ecma_object_get_class_name (ecma_object_t *);
+extern bool ecma_object_class_is (ecma_object_t *, uint32_t);
 
 /**
  * @}