Fix None target type with Ninja build.

test/ninja/none-rules/none-rules.gyp

Index: test/ninja/none-rules/none-rules.gyp
diff --git a/test/dependencies/double_dependent.gyp b/test/ninja/none-rules/none-rules.gyp
similarity index 61%
copy from test/dependencies/double_dependent.gyp
copy to test/ninja/none-rules/none-rules.gyp
index 334caff723ce8e2722e5a07c129e3658d04543b1..be7dac52b691383ed10ce4cf8efea20caf7d6543 100644
--- a/test/dependencies/double_dependent.gyp
+++ b/test/ninja/none-rules/none-rules.gyp
@@ -1,12 +1,13 @@
-# Copyright (c) 2012 Google Inc. All rights reserved.
+# Copyright (c) 2014 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'targets': [
     {
-      'target_name': 'double_dependent',
+      'target_name': 'doc',
       'type': 'none',
+      'sources': [],
     },
   ],
 }