Updating Chrome Linux installer to use nacl_helper instead of nacl_helper.so

chrome/tools/build/chromeos/FILES.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # Copyright (c) 2010 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.
 
 # This is a buildbot configuration file containing a tagged list of files
 # processed by the stage/archive scripts. The known tags are:
 #
@@ skipping 107 matching lines @@
 #    'filename': 'nacl_irt_x86_32.nexe',
 #    'arch': ['32bit'],
 #    'buildtype': ['dev', 'official'],
 #  },
 #  {
 #    'filename': 'nacl_irt_x86_64.nexe',
 #    'arch': ['64bit'],
 #    'buildtype': ['dev', 'official'],
 #  },
 #  {
-#    'filename': 'nacl_helper.so',
+#    'filename': 'nacl_helper',
 #    'arch': ['32bit', '64bit'],
 #    'buildtype': ['dev', 'official'],
 #  },
 #  {
 #    'filename': 'nacl_helper_bootstrap',
 #    'arch': ['32bit', '64bit'],
 #    'buildtype': ['dev', 'official'],
 #  },
 ]