Add bug closure.

debian/changelog

@@ -4,7 +4,7 @@ dpkg (1.13.13~) unstable; urgency=low
   * dpkg and dselect are now in section admin, not section base.
     Correct info in the control file.
   * Bump Standards-Version to 3.6.2 (no changes).
-  * Fix typo in dpkg-architecture man page.
+  * Fix typo in dpkg-architecture man page. Closes: #334330
 
   [ Christian Perrier ]
   * Updated Translations: