regen_makefile.sh: files/flags in separate lines

Make all regen_makefile.sh more readable and diff friendly by moving
each entry in FILES and CPPFLAGS_TTCN3 into separate lines. Order
entries alphabetically.

Related: OS#5252
Change-Id: I6b6866eb9f6ec6232e4ae434517457a4c8c1c050
diff --git a/gbproxy/regen_makefile.sh b/gbproxy/regen_makefile.sh
index e82649c..5ec6689 100755
--- a/gbproxy/regen_makefile.sh
+++ b/gbproxy/regen_makefile.sh
@@ -1,9 +1,34 @@
 #!/bin/bash
 
-FILES="*.ttcn *.ttcnpp BSSGP_EncDec.cc LLC_EncDec.cc IPL4asp_PT.cc IPL4asp_discovery.cc TCCConversion.cc TCCInterface.cc RLCMAC_EncDec.cc Native_FunctionDefs.cc TELNETasp_PT.cc IPA_CodecPort_CtrlFunctDef.cc GTPU_EncDec.cc GTPC_EncDec.cc GTP_CodecPort_CtrlFunctDef.cc SCCP_EncDec.cc  SCTPasp_PT.cc "
-FILES+="AF_PACKET_PT.cc AF_PACKET_PT.hh "
+FILES="
+	*.ttcn
+	*.ttcnpp
+	AF_PACKET_PT.cc
+	AF_PACKET_PT.hh
+	BSSGP_EncDec.cc
+	GTPC_EncDec.cc
+	GTPU_EncDec.cc
+	GTP_CodecPort_CtrlFunctDef.cc
+	IPA_CodecPort_CtrlFunctDef.cc
+	IPL4asp_PT.cc
+	IPL4asp_discovery.cc
+	LLC_EncDec.cc
+	Native_FunctionDefs.cc
+	RLCMAC_EncDec.cc
+	SCCP_EncDec.cc
+	SCTPasp_PT.cc
+	TCCConversion.cc
+	TCCInterface.cc
+	TELNETasp_PT.cc
+"
 
-export CPPFLAGS_TTCN3="-DIPA_EMULATION_GSUP -DIPA_EMULATION_CTRL -DUSE_MTP3_DISTRIBUTOR -DBSSGP_EM_L3 -DNS_EMULATION_FR"
+export CPPFLAGS_TTCN3="
+	-DBSSGP_EM_L3
+	-DIPA_EMULATION_CTRL
+	-DIPA_EMULATION_GSUP
+	-DNS_EMULATION_FR
+	-DUSE_MTP3_DISTRIBUTOR
+"
 
 ../regen-makefile.sh GBProxy_Tests.ttcn $FILES