Add more clarification to subversion/config error.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/6392037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@73334 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 158d2ae..3bf616b2 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -103,7 +103,7 @@
       return [
           output_api.PresubmitError(
               'It looks like you have not configured your subversion config '
-              'file.\n' + error_msg)
+              'file or it is not up-to-date.\n' + error_msg)
       ]
   except (OSError, IOError):
     return [