android: Always initialize 'log' variable

build/android/pylib/gtest/test_package.py

 # Copyright (c) 2012 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.
 
 
 import logging
 import os
 import re
 
 from pylib import constants
@@ skipping 126 matching lines @@
     re_fail = re.compile('\[  FAILED  \] ?(.*)\r\n')
     re_ok = re.compile('\[       OK \] ?(.*?) .*\r\n')
 
     # Test run statuses.
     re_passed = re.compile('\[  PASSED  \] ?(.*)\r\n')
     re_runner_fail = re.compile('\[ RUNNER_FAILED \] ?(.*)\r\n')
     # Signal handlers are installed before starting tests
     # to output the CRASHED marker when a crash happens.
     re_crash = re.compile('\[ CRASHED      \](.*)\r\n')
 
+    log = ''
     try:
       while True:
         full_test_name = None
         found = p.expect([re_run, re_passed, re_runner_fail],
                          timeout=self.timeout)
         if found == 1:  # re_passed
           break
         elif found == 2:  # re_runner_fail
           break
         else:  # re_run
@@ skipping 32 matching lines @@
     finally:
       p.close()
 
     ret_code = self._GetGTestReturnCode()
     if ret_code:
       logging.critical(
           'gtest exit code: %d\npexpect.before: %s\npexpect.after: %s',
           ret_code, p.before, p.after)
 
     return results