pgw: Improve checks around Gy messages

Change-Id: Ica3ca4cf72113d66e74dcff9f838e39cc5d63468
diff --git a/pgw/gen_links.sh b/pgw/gen_links.sh
index b061fea..c8333c7 100755
--- a/pgw/gen_links.sh
+++ b/pgw/gen_links.sh
@@ -6,6 +6,7 @@
 
 DIR=$BASEDIR/titan.Libraries.TCCUsefulFunctions/src
 FILES="TCCInterface_Functions.ttcn TCCConversion_Functions.ttcn TCCConversion.cc TCCInterface.cc TCCInterface_ip.h"
+FILES+=" TCCEncoding_Functions.ttcn TCCEncoding.cc " # BCD coding
 gen_links $DIR $FILES
 
 DIR=$BASEDIR/titan.TestPorts.Common_Components.Socket-API/src