Updated to work with new path sturcture

git-svn-id: http://svn.savannah.nongnu.org/svn/rdiff-backup@239 2b77aa54-bcbc-44c9-a7ec-4f6cf2b41109

trunk/rdiff-backup/testing/librsynctest.py

 import unittest, random
 from commontest import *
-import librsync
+from rdiff_backup import librsync
 
 def MakeRandomFile(path):
 	"""Writes a random file of length between 10000 and 100000"""