debian: Add bug closure for Dpkg::Dist:Files load_dir bug

Closes: #843436

debian/changelog

@@ -2,7 +2,7 @@ dpkg (1.18.13) UNRELEASED; urgency=medium
 
   * Perl modules:
     - Do not try to load non-files in Dpkg::Dist::Files load_dir method.
-      Fixes test failures on non-Linux architectures.
+      Fixes test failures on non-Linux architectures. Closes: #843436
 
  -- Guillem Jover <guillem@debian.org>  Sun, 06 Nov 2016 06:28:11 +0100