Add support for new.target (#3469)

Notable changes:
* Extracted the pure JS/builtin and external C method invocations
  into two new methods (`ecma_op_function_call_{simple, external}`).
* Updated parser/scanner to handle "new.target" correctly.
* Added JS test case.

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.u-szeged@partner.samsung.com

jerry-core/parser/js/js-parser-statm.c

@@ -3044,7 +3044,14 @@ parser_parse_statements (parser_context_t *context_p) /**< context */
           options |= PARSE_EXPR_HAS_LITERAL;
         }
 
-        if (context_p->status_flags & PARSER_IS_FUNCTION)
+#if ENABLED (JERRY_ES2015)
+        bool is_eval = (context_p->status_flags & PARSER_IS_EVAL) != 0;
+#else /* !ENABLED (JERRY_ES2015) */
+        /* In case of ES5.1 it does not matter that this is an eval parsing or not. */
+        bool is_eval = false;
+#endif /* ENABLED (JERRY_ES2015) */
+
+        if ((context_p->status_flags & PARSER_IS_FUNCTION) && !is_eval)
         {
           parser_parse_expression_statement (context_p, options);
         }