Set svn:executable bit on scripts that are executable.

media/tools/bug_hunter/bug_hunter_test.py

-#!/usr/bin/env python
 # 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.
 
 """Integration tests for bug hunter."""
 
 import csv
 from optparse import Values
 import os
 import unittest
@@ skipping 76 matching lines @@
     bh.WriteIssuesToFileInCSV(self._GetIssue(), self._TEST_FILENAME)
 
     with open(self._TEST_FILENAME, 'r') as f:
       reader = csv.reader(f)
       self.assertEquals(reader.next(), ['status', 'content', 'state',
                                         'issue_id', 'urls', 'title', 'labels',
                                         'author', 'comments'])
       self.assertEquals(reader.next(), ['status', 'content', 'state', '0',
                                         '[]', 'title', '[]', 'author', '[]'])
       self.assertRaises(StopIteration, reader.next)