Add comments setting emacs and vim tab width and expansion variables....

o3d/build/libs.gyp

 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
     'dx_redist_path': '../../o3d-internal/third_party/dx_nov_2007_redist',
     'dx_redist_exists': '<!(python file_exists.py ../../o3d-internal/third_party/dx_nov_2007_redist/d3dx9_36.dll)',
   },
@@ skipping 150 matching lines @@
                   ],
                 ],
               },
             ],
           },
         ],
       }
     ],
   ],
 }
+
+# Local Variables:
+# tab-width:2
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=2 shiftwidth=2: