progman: Build language resource files separately.

Do not include them from an other rc file.

programs/progman/Da.rc

diff --git a/programs/progman/Da.rc b/programs/progman/Da.rc
index b99c5f5..7e1438d 100644
--- a/programs/progman/Da.rc
+++ b/programs/progman/Da.rc
@@ -18,6 +18,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
+#include "progman.h"
+
 LANGUAGE LANG_DANISH, SUBLANG_DEFAULT
 
 /* Menu */