Move kernel baseline tests to front_end.

pkg/front_end/test/fasta/rasta/parser_error.dart

-// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE.md file.
-
-// Copy of third_party/dart-sdk/tests/language/argument_definition_test.dart.
-
-import "package:expect/expect.dart";
-
-int test(a, {b, c}) {
-  if (?b) return b;  /// 01: compile-time error
-  return a + b + c;
-}
-
-main() {
-  Expect.equals(6, test(1, b: 2, c:3));
-}