[Distutils] the svn >= 1.5 bug with setuptools/command/sdist.py: global name 'log' is not defined

[dan corson]

This was brought up a while back by someone working with experimental 
svn 1.6:
http://mail.python.org/pipermail/distutils-sig/2008-February/008794.html
But I'm not sure it was addressed, and now we're getting the same
problem here with svn 1.5.1.

This same fix fixes it:
--- sdist.py.vanilla    2008-08-18 20:54:07.000000000 -0700
+++ sdist.py    2008-08-18 20:12:11.000000000 -0700
@@ -1,5 +1,6 @@
 from distutils.command.sdist import sdist as _sdist
 from distutils.util import convert_path
+from distutils import log
 import os, re, sys, pkg_resources
 
 entities = [

But I'm not sure it's the best one.  It's definitely good that this fix
should address the problem once and for all (i.e. no re-break on future
svn versions), but maybe there is a better larger fix.  I think it
should be addressed somehow though since svn 1.5.1 is now the latest
release.  Thanks, --dan