Fix python scripts in src/tools/

tools/heapcheck/suppressions.py

Index: tools/heapcheck/suppressions.py
diff --git a/tools/heapcheck/suppressions.py b/tools/heapcheck/suppressions.py
old mode 100644
new mode 100755
index 91c523816819e29d458a3ca7d0f002a2fb9a3496..506caa670f8d15ae506b89194782953a8b476351
--- a/tools/heapcheck/suppressions.py
+++ b/tools/heapcheck/suppressions.py
@@ -1,10 +1,8 @@
-#!/usr/bin/python
-# Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+#!/usr/bin/env python
+# Copyright (c) 2011 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.
 
-# suppressions.py
-
 """Valgrind-style suppressions for heapchecker reports.
 
 Suppressions are defined as follows:
@@ -167,5 +165,6 @@ def MatchTest():
   assert not re_chars.Match(['foobar'])
   print 'PASS'
 
+
 if __name__ == '__main__':
   MatchTest()