po: Update Vietnamese dselect translation

Signed-off-by: Trần Ngọc Quân <vnwildman@gmail.com>
Signed-off-by: Guillem Jover <guillem@debian.org>

debian/changelog

@@ -21,6 +21,7 @@ dpkg (1.17.23) UNRELEASED; urgency=low
   * Portuguese (Miguel Figueiredo).
   * Russian (Yuri Kozlov). Closes: #771682
   * Spanish (Javier Fernández-Sanguino)
+  * Vietnamese (Trần Ngọc Quân).
 
  -- Guillem Jover <guillem@debian.org>  Fri, 28 Nov 2014 02:41:17 +0100