Use `/usr/bin/env python` instead of `/usr/bin/python2.6`.

Useful on machines that don't have 2.6 but do have 2.7.

BUG=none
TEST=none


Review URL: http://codereview.chromium.org/8825016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113334 0039d316-1c4b-4281-b951-d872f2087c98

chrome/tools/build/mac/tweak_info_plist

-#!/usr/bin/python2.6
+#!/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

tools/mac/symbolicate_crash.py

-#!/usr/bin/env python2.6
+#!/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.