Add another alternative that needs to be cleaned up

debian/dpkg.preinst

@@ -47,6 +47,7 @@ case "$1" in
         clean_alternative x-terminal-emulator x-terminal-emulator.1.gz
         clean_alternative x-session-manager x-session-manager.1.gz
         clean_alternative x-window-manager x-window-manager.1.gz
+        clean_alternative awk nawk
 
 	case "$2" in
 	    # Upgrade from pre-conffile dpkg.cfg