[Bug libstdc++/47145] configure test for docbook-xsl-ns stylesheets uses hardcoded path

[doko at ubuntu dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47145

--- Comment #25 from Matthias Klose <doko at ubuntu dot com> 2011-03-17 
22:00:16 UTC ---
builds on a non-networked machine succeed