Move kernel baseline tests to front_end.

pkg/front_end/test/fasta/functions.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 file.
-
-main() {
-  void local(void f({a})) {
-    f(a: "Hello, World");
-    f();
-  }
-  local(({a: "Default greeting!"}) {
-    print(a);
-  });
-}