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/base/ecma-alloc.c

@@ -92,18 +92,19 @@ DECLARE_ROUTINES_FOR (external_pointer)
  * @return pointer to allocated memory
  */
 inline ecma_extended_object_t * __attr_always_inline___
-ecma_alloc_extended_object (void)
+ecma_alloc_extended_object (size_t size) /**< size of object */
 {
-  return jmem_heap_alloc_block (sizeof (ecma_extended_object_t));
+  return jmem_heap_alloc_block (size);
 } /* ecma_alloc_extended_object */
 
 /**
  * Dealloc memory of an extended object
  */
 inline void __attr_always_inline___
-ecma_dealloc_extended_object (ecma_extended_object_t *ext_object_p) /**< property pair to be freed */
+ecma_dealloc_extended_object (ecma_extended_object_t *ext_object_p, /**< property pair to be freed */
+                              size_t size) /**< size of object */
 {
-  jmem_heap_free_block (ext_object_p, sizeof (ecma_extended_object_t));
+  jmem_heap_free_block (ext_object_p, size);
 } /* ecma_dealloc_extended_object */
 
 /**