Updates to make install_third_party build gtest and gmock on windows.

build_tools/generate_windows_installer.py

 #!/usr/bin/python
 # Copyright 2011, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
@@ skipping 23 matching lines @@
 import optparse
 import os
 import shutil
 import stat
 import string
 import subprocess
 import sys
 
 # TODO(NaCl SDK team):  Put tumbler back in the package when it's ported.
 IGNORE_PATTERN = ('.download*', '.svn*', '.gitignore*', '.git*', 'tumbler*',
-                  'cygwin*', 'toolchain*')
+                  'cygwin*')
 INSTALLER_DIRS = ['examples',
                   'project_templates',
                   'third_party']
 INSTALLER_FILES = ['AUTHORS',
                    'COPYING',
                    'LICENSE',
                    'NOTICE',
                    'README']
 
 def RawVersion():
@@ skipping 171 matching lines @@
   else:
     print "Can not create NSIS script (even after 100 tries)"
 
   # Clean up.
   os.chdir(home_dir)
   shutil.rmtree(temp_dir)
 
 
 if __name__ == '__main__':
   main(sys.argv[1:])