Update project authors statements to Dartino

tests/servicec/input_files/cyclic_imports_3.idl

-// 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 file.
 
 service Foo { }
 
 struct Bar {
   Baz baz;  // cyclicStruct
 }
 
 struct Baz {
   Bar bar;
 }