filebuf_sputn_unbuf.cc: New, adapted from libstdc++/11378.

2004-04-04  Paolo Carlini  <pcarlini@suse.de>
	    Petur Runolfsson  <peturr02@ru.is>

	* testsuite/performance/27_io/filebuf_sputn_unbuf.cc: New,
	adapted from libstdc++/11378.

Co-Authored-By: Petur Runolfsson <peturr02@ru.is>

From-SVN: r80398