[in tools/server-side/svnpubsub]

Log stderr output when a child fails.

* svnwcsub.py
  (check_call): Add some logging to the 'if failed' branch


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1432791 13f79535-47bb-0310-9956-ffa450edef68
Revert unintentional part of r1432791.

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1432792 13f79535-47bb-0310-9956-ffa450edef68