Update project authors statements to Dartino

tools/testing/dart/fletch_warnings_suite.dart

-// Copyright (c) 2015, the Fletch project authors. Please see the AUTHORS file
+// Copyright (c) 2015, the Dartino 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.md file.
 
 library test.fletch_warnings_suite;
 
 import 'dart:io' as io;
 
 import 'dart:convert' show
     UTF8;
 
@@ skipping 117 matching lines @@
 
     var filteredStdout =
         UTF8.decode(stdout, allowMalformed: true).replaceAll(noLintFilter, "");
     if (filteredStdout.isNotEmpty) {
       return Expectation.STATIC_WARNING;
     }
 
     return Expectation.PASS;
   }
 }