Commit miss at r21521, poited out by Yugui.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@21601 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

LEGAL

@@ -260,6 +260,17 @@ missing/strlcpy.c
    OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
    ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+missing/langinfo.c
+
+  This file is from http://www.cl.cam.ac.uk/~mgk25/ucs/langinfo.c.
+  Ruby uses a modified version. The file contains the following
+  author/copyright notice:
+
+  Markus.Kuhn@cl.cam.ac.uk -- 2002-03-11
+  Permission to use, copy, modify, and distribute this software
+  for any purpose and without fee is hereby granted. The author
+  disclaims all warranties with regard to this software.
+
 ext/digest/md5/md5.[ch]:
 
   These files are under the following license.  Ruby uses modified