bts: Add testscase & infra to validate Osmux support BTS<->BSC

Related: SYS#5987
Change-Id: I1af23c7a60b05edc3b544f1fea0023f48e89f7a7
diff --git a/bts/regen_makefile.sh b/bts/regen_makefile.sh
index 147d64f..054b750 100755
--- a/bts/regen_makefile.sh
+++ b/bts/regen_makefile.sh
@@ -11,6 +11,7 @@
 	IuUP_EncDec.cc
 	L1CTL_PortType_CtrlFunctDef.cc
 	Native_FunctionDefs.cc
+	OSMUX_CodecPort_CtrlFunctDef.cc
 	RLCMAC_EncDec.cc
 	RTP_CodecPort_CtrlFunctDef.cc
 	RTP_EncDec.cc