silence useless warning message

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7719 d0543943-73ff-0310-b7d9-9358b9ac24b2

Makefile.am

@@ -193,7 +193,7 @@ samples-htdocs:
 		dir=`echo $$htdocsfile | sed -e 's|/[^/]*$$||'`; \
 		filename=`echo $$htdocsfile | sed -e 's|^.*/||'`; \
 		test -d $(DESTDIR)$(PREFIX)/$$dir || $(mkinstalldirs) $(DESTDIR)$(prefix)/$$dir ; \
-		test -f $(DESTDIR)$(PREFIX)/$$dir/$$filename || $(INSTALL) -m 644 $$dir/$$filename $(DESTDIR)$(PREFIX)/$$dir; \
+		test -f $(DESTDIR)$(PREFIX)/$$dir/$$filename || $(INSTALL) -m 644 $$dir/$$filename $(DESTDIR)$(PREFIX)/$$dir 2>/dev/null;  \
 	done
 
 samples: samples-conf samples-htdocs