Add generic-methods 'golden' tests for 'reify' transformation

pkg/kernel/testcases/reify/generic_methods_local_variable_declaration_test.dart

+// Copyright (c) 2017, 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.
+
+// Test that a type variable can be used to declare local variables, and that
+// these local variables are of correct type.
+
+library generic_methods_local_variable_declaration_test;
+
+import "test_base.dart";
+
+class X {}
+
+abstract class Generator<T> {
+  T generate();
+}
+
+class A implements Generator<A> {
+  generate() {
+    return new A();
+  }
+
+  String toString() => "instance of A";
+}
+
+class B implements Generator<B> {
+  generate() {
+    return new B();
+  }
+
+  String toString() => "instance of B";
+}
+
+String fun<T extends Generator<T>>(T t) {
+  T another = t.generate();
+  String anotherName = "$another";
+
+  expectTrue(another is T);
+  expectTrue(another is Generator<T>);
+
+  return anotherName;
+}
+
+main() {
+  A a = new A();
+  B b = new B();
+
+  expectTrue(fun<A>(a) == "instance of A");
+  expectTrue(fun<B>(b) == "instance of B");
+}