po: Update Turkish programs translation

Closes: #785096
Signed-off-by: Guillem Jover <guillem@debian.org>

debian/changelog

@@ -216,6 +216,7 @@ dpkg (1.18.0) UNRELEASED; urgency=low
 
   [ Updated programs translations ]
   * Simplified Chinese (Zhou Mo). Closes: #782326
+  * Turkish (Mert Dirik). Closes: #785096
   * Vietnamese (Trần Ngọc Quân).
 
   [ Updated scripts translations ]