Optimize ecma_builtin_helper_def_prop. (#3007)

This patch removes the ecma_property_descriptor_t structure bitfields and substitutes it with an uint16_t flag field
to reduce the cost of the transformation from/into the ecma_property_flags_t.
Also the is_throw last arguments is embedded to the property descriptor structure during the property defining process to reduce the number of arguments of the function.

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

jerry-core/ecma/operations/ecma-iterator-object.c

@@ -64,8 +64,7 @@ ecma_create_array_from_iter_element (ecma_value_t value, /**< value */
     ecma_value_t completion = ecma_builtin_helper_def_prop (new_array_p,
                                                             index_string_p,
                                                             (index == 0) ? index_value : value,
-                                                            ECMA_PROPERTY_CONFIGURABLE_ENUMERABLE_WRITABLE,
-                                                            false); /* Failure handling */
+                                                            ECMA_PROPERTY_CONFIGURABLE_ENUMERABLE_WRITABLE);
 
     /* 4.b */
     JERRY_ASSERT (ecma_is_value_true (completion));