IPA_Emulation: Make dependencies to RSL/MGCP/SCCP/GSUP conditional

Let's use the preprocessor to avoid IPA_Emulation pulling *all*
dependencies into each and any of our projects.  The code readability
suffers a bit from the many #ifdefs, but compilation speed increases
if we don't have to pull in all those (recursive) dependencies.

After all, a BTS test case will never need SCCP, GSUP or MGCP.

Change-Id: Ic0231adbd2171214de133d26b3fbf36130ee8aa0
diff --git a/msc/gen_links.sh b/msc/gen_links.sh
index 9d3c28e..b2e2ff0 100755
--- a/msc/gen_links.sh
+++ b/msc/gen_links.sh
@@ -76,9 +76,9 @@
 
 DIR=../library
 FILES="General_Types.ttcn GSM_Types.ttcn Osmocom_Types.ttcn MNCC_Types.ttcn MNCC_EncDec.cc MNCC_CodecPort.ttcn mncc.h MNCC_Emulation.ttcn Osmocom_VTY_Functions.ttcn Native_Functions.ttcn Native_FunctionDefs.cc "
-FILES+="IPA_Types.ttcn IPA_Emulation.ttcn IPA_CodecPort.ttcn IPA_CodecPort_CtrlFunct.ttcn IPA_CodecPort_CtrlFunctDef.cc RSL_Types.ttcn GSUP_Types.ttcn GSUP_Emulation.ttcn "
+FILES+="IPA_Types.ttcn IPA_Emulation.ttcnpp IPA_CodecPort.ttcn IPA_CodecPort_CtrlFunct.ttcn IPA_CodecPort_CtrlFunctDef.cc GSUP_Types.ttcn GSUP_Emulation.ttcn "
 FILES+="Osmocom_CTRL_Types.ttcn Osmocom_CTRL_Functions.ttcn Osmocom_CTRL_Adapter.ttcn L3_Templates.ttcn L3_Common.ttcn "
-FILES+="BSSMAP_Emulation.ttcn BSSAP_CodecPort.ttcn BSSMAP_Templates.ttcn BSSAP_Adapter.ttcn MGCP_Types.ttcn MGCP_Templates.ttcn MGCP_CodecPort_CtrlFunct.ttcn MGCP_Emulation.ttcn IPA_Emulation.ttcn "
+FILES+="BSSMAP_Emulation.ttcn BSSAP_CodecPort.ttcn BSSMAP_Templates.ttcn BSSAP_Adapter.ttcn MGCP_Types.ttcn MGCP_Templates.ttcn MGCP_CodecPort_CtrlFunct.ttcn MGCP_Emulation.ttcn "
 FILES+="RTP_CodecPort.ttcn RTP_CodecPort_CtrlFunctDef.cc "
 FILES+="MGCP_CodecPort.ttcn MGCP_CodecPort_CtrlFunctDef.cc "
 gen_links $DIR $FILES