[bsc] Move the GSM 04.08 helper functions to gsm_04_08_utils.c
The existing gsm_04_08.c implementation is mixing BSC and MSC
behavior. Move some simple parsing and generation functions over
to gsm_04_08_utils.c to allow a different MSC to define the policy.
diff --git a/openbsc/tests/gsm0408/Makefile.am b/openbsc/tests/gsm0408/Makefile.am
index c68b4ed..ff8caf9 100644
--- a/openbsc/tests/gsm0408/Makefile.am
+++ b/openbsc/tests/gsm0408/Makefile.am
@@ -2,4 +2,4 @@
noinst_PROGRAMS = gsm0408_test
gsm0408_test_SOURCES = gsm0408_test.c
-gsm0408_test_LDADD = $(top_builddir)/src/libmsc.a $(top_builddir)/src/libbsc.a -ldbi
+gsm0408_test_LDADD = $(top_builddir)/src/libbsc.a $(top_builddir)/src/libmsc.a $(top_builddir)/src/libbsc.a -ldbi