fix coverage of sdk build

test/codegen_test.dart

 // Copyright (c) 2015, 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 code generation.
 /// Runs Dart Dev Compiler on all input in the `codegen` directory and checks
 /// that the output is what we expected.
 library dev_compiler.test.codegen_test;
 
 import 'dart:io';
@@ skipping 113 matching lines @@
         savedLogger = AnalysisEngine.instance.logger;
         AnalysisEngine.instance.logger = new PrintLogger();
       });
       tearDown(() {
         AnalysisEngine.instance.logger = savedLogger;
       });
 
       test('devc dart:core', () {
         // Get the test SDK. We use a checked in copy so test expectations can
         // be generated against a specific SDK version.
-        var testSdk = path.join(testDirectory, 'generated_sdk');
+        var testSdk = path.join(testDirectory, '..', 'tool', 'generated_sdk');
         var result = compile('dart:core', testSdk, checkSdk: true);
         var outputDir = new Directory(path.join(expectDir, 'core'));
         var outFile = new File(path.join(expectDir, 'dart/core.js'));
         expect(outFile.existsSync(), true,
             reason: '${outFile.path} was created for dart:core');
       });
     });
   }
 
   var expectedRuntime =
@@ skipping 123 matching lines @@
     print('[AnalysisEngine] error $message $exception');
   }
 
   @override void logError2(String message, Object exception) {
     print('[AnalysisEngine] error $message $exception');
   }
 
   void logInformation(String message, [CaughtException exception]) {}
   void logInformation2(String message, Object exception) {}
 }