luci-py: Making __file__ usage unicode safe.

client/example/common.py

 # Copyright 2012 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.
 
 import datetime
 import getpass
 import hashlib
 import optparse
 import os
 import subprocess
 import sys
 
 
-ROOT_DIR = os.path.dirname(os.path.abspath(__file__))
+ROOT_DIR = os.path.dirname(os.path.abspath(
+    __file__.decode(sys.getfilesystemencoding())))
 sys.path.append(os.path.join(ROOT_DIR, '..', 'third_party'))
 
 import colorama
 
 
 CHROMIUM_SWARMING_OSES = {
     'darwin': 'Mac',
     'cygwin': 'Windows',
     'linux2': 'Ubuntu',
     'win32': 'Windows',
@@ skipping 91 matching lines @@
         'isolate.py',
         'archive',
         '--isolate', os.path.join('payload', 'hello_world.isolate'),
         '--isolated', isolated,
         '--isolate-server', isolate_server,
         '--config-variable', 'OS', swarming_os,
       ], verbose)
   with open(isolated, 'rb') as f:
     hashval = hashlib.sha1(f.read()).hexdigest()
   return isolated, hashval