test renaming overhaul: step 4 client tests

tests/benchmark_smoke/smoketest_lib.dart

 // Copyright (c) 2011, 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('Smoketest_lib');
+#library('smoketest_lib');
 
-#import("benchmarklib.dart");
+#import("benchmark_lib.dart");
 #import("dart:html");
 
 /** 
  * This is a sample no-op benchmark to ensure that frog has not dramatically
  * broken Firefox.
  */
 class Smoketest extends BenchmarkBase {
 
   const Smoketest() : super("Smoketest");
 
   void run() {}
 
   static void main() {
     new Smoketest().report();
   }
 
   static void log(String str) {
     print(str);
   }
 }