Support syntax error feedback in parser.

Now, parser correctly finishes parse procedure if syntax of source code is incorrect (syntax correctness is indicated using return value):
 - parser-internal memory management is performed using jsp_mm_alloc / jsp_mm_free;
 - upon detection of incorrect syntax, all parser-allocated memory regions are deallocated using jsp_mm_free_all and parse finishes with corresponding return value.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com

jerry-core/jrt/jrt-fatals.cpp

@@ -47,11 +47,6 @@ jerry_fatal (jerry_fatal_code_t code) /**< status code */
       /* print nothing as it may invoke syscall recursively */
       break;
     }
-    case ERR_PARSER:
-    {
-      printf ("ERR_PARSER\n");
-      break;
-    }
     case ERR_UNIMPLEMENTED_CASE:
     {
       printf ("ERR_UNIMPLEMENTED_CASE\n");