Reland "Merge more Kernel infrastructure from kernel_sdk SDK fork."

tests/kernel/unsorted/local_function_test.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.
+
+// Tests of function expressions and function statements.
+
+import 'expect.dart';
+
+main() {
+  var even;
+  odd(n) => n > 0 && even(n - 1);
+  even = (n) => n == 0 || odd(n - 1);
+
+  Expect.isTrue(even(0));
+  Expect.isTrue(!odd(0));
+
+  Expect.isTrue(odd(1));
+  Expect.isTrue(!even(1));
+
+  Expect.isTrue(even(42));
+  Expect.isTrue(!odd(42));
+
+  Expect.isTrue(odd(101));
+  Expect.isTrue(!even(101));
+}