luci-py: Making __file__ usage unicode safe.

client/tools/swarming_count_tasks.py

 #!/usr/bin/env python
 # Copyright 2015 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 """Calculate statistics about tasks.
 
 Saves the data fetched from the server into a json file to enable reprocessing
 the data without having to always fetch from the server.
 """
 
 import collections
 import datetime
 import json
 import logging
 import optparse
 import os
 import subprocess
 import Queue
 import threading
 import sys
 import urllib
 
 
-CLIENT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+CLIENT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(
+    __file__.decode(sys.getfilesystemencoding()))))
 sys.path.insert(0, CLIENT_DIR)
 
 
 from third_party import colorama
 from utils import graph
 
 
 _EPOCH = datetime.datetime.utcfromtimestamp(0)
 
 
@@ skipping 220 matching lines @@
   print('')
   if options.dimensions:
     present_dimensions(data, options.daily_count)
   else:
     present_counts(data, options.daily_count)
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())