Add json parse and stringify function to jerryscript c api (#2243)

JerryScript-DCO-1.0-Signed-off-by: Zsolt Raduska rzsolt@inf.u-szeged.hu

jerry-core/ecma/builtin-objects/ecma-builtin-helpers-json.c

@@ -18,6 +18,8 @@
 #include "ecma-builtin-helpers.h"
 #include "lit-char-helpers.h"
 
+#ifndef CONFIG_DISABLE_JSON_BUILTIN
+
 /** \addtogroup ecma ECMA
  * @{
  *
@@ -221,6 +223,8 @@ ecma_builtin_helper_json_create_non_formatted_json (lit_utf8_byte_t left_bracket
   return ecma_make_string_value (result_str_p);
 } /* ecma_builtin_helper_json_create_non_formatted_json */
 
+#endif /* !CONFIG_DISABLE_JSON_BUILTIN */
+
 /**
  * @}
  * @}