generalize shared code from regen_makefile.sh into shared helper script

Change-Id: I86a738420851a7d9e3bdb2671f6862c3d505a4ba
diff --git a/msc_tests/regen_makefile.sh b/msc_tests/regen_makefile.sh
index 7db539d..132da3b 100755
--- a/msc_tests/regen_makefile.sh
+++ b/msc_tests/regen_makefile.sh
@@ -2,12 +2,4 @@
 
 FILES="*.ttcn SCCP_EncDec.cc  SCTPasp_PT.cc  TCCConversion.cc TCCInterface.cc"
 
-ttcn3_makefilegen -l -f MSC_Tests.ttcn $FILES
-sed -i -e 's/# TTCN3_DIR = /TTCN3_DIR = \/usr/' Makefile
-sed -i -e 's/LDFLAGS = /LDFLAGS = -L \/usr\/lib\/titan /' Makefile
-#sed -i -e 's/TTCN3_LIB = ttcn3-parallel/TTCN3_LIB = ttcn3/' Makefile
-sed -i -e 's/CPPFLAGS = -D$(PLATFORM) -I$(TTCN3_DIR)\/include/CPPFLAGS = -D$(PLATFORM) -I$(TTCN3_DIR)\/include -I\/usr\/include\/titan/' Makefile
-
-# for TITAN 6.3.0
-sed -i -e 's/TTCN3_DIR = $/TTCN3_DIR = \/usr/' Makefile
-sed -i -e 's/\/bin\/compiler/\/bin\/ttcn3_compiler/' Makefile
+../regen-makefile.sh MSC_Tests.ttcn $FILES