Changes ninja generator to only output empty names if not already output

test/ninja/empty-and-non-empty-duplicate-name/subdir/included.gyp

Index: test/ninja/empty-and-non-empty-duplicate-name/subdir/included.gyp
===================================================================
--- test/ninja/empty-and-non-empty-duplicate-name/subdir/included.gyp	(revision 0)
+++ test/ninja/empty-and-non-empty-duplicate-name/subdir/included.gyp	(revision 0)
@@ -0,0 +1,19 @@
+# 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': 'empty_target',
+      'type': 'executable',
+      'sources': [
+        'test.cc',
+      ],
+    },
+    {
+      'target_name': 'included_empty_target',
+      'type': 'none',
+    },
+  ],
+}
Property changes on: test/ninja/empty-and-non-empty-duplicate-name/subdir/included.gyp
___________________________________________________________________
Added: svn:eol-style
   + LF