Add @MirrorsUsed annotations to speed up tests.

tests/lib/mirrors/fake_function_with_call_test.dart

 // Copyright (c) 2013, 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.
 
+library lib;
+
+@MirrorsUsed(targets: "lib")
 import "dart:mirrors";
 
 import "package:expect/expect.dart";
 
 membersOf(ClassMirror cm) {
   var result = new Map();
   cm.declarations.forEach((k,v) {
     if(v is MethodMirror && !v.isConstructor) result[k] = v;
     if(v is VariableMirror) result[k] = v;
   });
@@ skipping 29 matching lines @@
   Expect.equals(#int, mm.returnType.simpleName);
   Expect.equals(#int, mm.parameters[0].type.simpleName);
   Expect.equals(#int, mm.parameters[1].type.simpleName);
 
   ClassMirror km = cm.type;
   Expect.equals(reflectClass(WannabeFunction), km);
   Expect.equals(#WannabeFunction, km.simpleName);
   Expect.equals(mm, km.declarations[#call]);
   Expect.setEquals([#call, #method], membersOf(km).keys);
 }