Move kernel baseline tests to front_end.

pkg/front_end/test/fasta/rasta/issue_000070.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.
-
-import "package:expect/expect.dart";
-
-class A<N, S, U> {
-  final List<U> field;
-
-  A(N n, S s) : field = new List<U>() {
-    Expect.isTrue(n is N);
-    Expect.isTrue(s is S);
-  }
-
-  A.empty() : field = null{}
-
-  factory A.f(S s) {
-    Expect.isTrue(s is S);
-    return new A.empty();
-  }
-
-  const A.c(U u, S s) : field = const [null];
-
-  List<U> get getter {
-    return field;
-  }
-
-  void set setter(S s){}
-}
-
-abstract class J<Aa, B>{}
-
-abstract class I<H, C, K> extends J<C, K>
-{ }
-
-
-main() {
-  new A<num, double, List>(1, 2.0);
-  A a = new A<int, int, int>.f(1);
-  const A<int, int, List>.c(const[], 1);
-
-  var z = a.getter;
-  a.setter = 1;
-}