[test] Turn off certificate verification when downloading test data on windows.

tools/testrunner/local/utils.py

 # Copyright 2012 the V8 project authors. 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.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 108 matching lines @@
   return GuessOS() == 'windows'
 
 
 def URLRetrieve(source, destination):
   """urllib is broken for SSL connections via a proxy therefore we
   can't use urllib.urlretrieve()."""
   if IsWindows():
     try:
       # In python 2.7.6 on windows, urlopen has a problem with redirects.
       # Try using curl instead. Note, this is fixed in 2.7.8.
-      subprocess.check_call(["curl", source, '-L', '-o', destination])
+      subprocess.check_call(["curl", source, '-k', '-L', '-o', destination])
       return
     except:
       # If there's no curl, fall back to urlopen.
       print "Curl is currently not installed. Falling back to python."
       pass
   with open(destination, 'w') as f:
     f.write(urllib2.urlopen(source).read())