mgw: use library version of RTP_CodecPort_CtrlFunct

The .cc and the .ttcn file of RTP_CodecPort_CtrlFunct is currently
copied into the mgw directory and then used. However, those files do
exist in the /library folder as well, lets just link them using
gen_links.sh

Change-Id: I14f80051f6a168b7a8155c6e523c085e974b62b5
diff --git a/mgw/gen_links.sh b/mgw/gen_links.sh
index f919637..8893954 100755
--- a/mgw/gen_links.sh
+++ b/mgw/gen_links.sh
@@ -44,6 +44,7 @@
 FILES+="OSMUX_CodecPort.ttcn OSMUX_Emulation.ttcn OSMUX_Types.ttcn OSMUX_CodecPort_CtrlFunct.ttcn OSMUX_CodecPort_CtrlFunctDef.cc "
 FILES+="Native_Functions.ttcn Native_FunctionDefs.cc IPCP_Types.ttcn "
 FILES+="Osmocom_VTY_Functions.ttcn "
+FILES+="RTP_CodecPort_CtrlFunct.ttcn RTP_CodecPort_CtrlFunctDef.cc "
 gen_links $DIR $FILES
 
 ignore_pp_results