Fix a "pub run" bug.

test/run/loads_package_imports_in_a_dependency_test.dart

-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   integration('runs a named Dart application in a dependency', () {
     d.dir("foo", [
       d.libPubspec("foo", "1.0.0"),
+      d.dir("lib", [
+        d.file('foo.dart', "final value = 'foobar';")
+      ]),
       d.dir("bin", [
-        d.file("bar.dart", "main() => print('foobar');")
+        d.file("bar.dart", """
+import "package:foo/foo.dart";
+
+main() => print(value);
+""")
       ])
     ]).create();
 
     d.dir(appPath, [
       d.appPubspec({
         "foo": {"path": "../foo"}
       })
     ]).create();
 
     pubGet();
 
     var pub = pubRun(args: ["foo:bar"]);
     pub.stdout.expect("foobar");
     pub.shouldExit();
   });
 }