ggsn: Set up diameter for open5gs

Change-Id: Iedadb98be2a2e851b75e4e67c22bca7047191fec
diff --git a/ggsn_tests/regen_makefile.sh b/ggsn_tests/regen_makefile.sh
index 7adbd0b..4bdc87a 100755
--- a/ggsn_tests/regen_makefile.sh
+++ b/ggsn_tests/regen_makefile.sh
@@ -5,6 +5,8 @@
 FILES="
 	*.ttcn
 	BSSGP_EncDec.cc
+	DIAMETER_CodecPort_CtrlFunctDef.cc
+	DIAMETER_EncDec.cc
 	GTPC_EncDec.cc
 	GTPU_EncDec.cc
 	GTP_CodecPort_CtrlFunctDef.cc