[msc] Move gsm_04_08.c, mncc and various others to libmsc

Currently we have circular dependencies from libbsc to libmsc
and this requires to play some linker tricks. The problem will
be solved in two ways, first we will get rid of the circular
dependencies and second we can start using --start-group and
--end-group of the linker to play the tricks for us.
diff --git a/openbsc/tests/db/Makefile.am b/openbsc/tests/db/Makefile.am
index c8a3970..8ce7e3c 100644
--- a/openbsc/tests/db/Makefile.am
+++ b/openbsc/tests/db/Makefile.am
@@ -4,5 +4,5 @@
 noinst_PROGRAMS = db_test
 
 db_test_SOURCES = db_test.c
-db_test_LDADD = $(top_builddir)/src/libbsc.a $(top_builddir)/src/libmsc.a -ldl -ldbi
+db_test_LDADD = $(top_builddir)/src/libbsc.a $(top_builddir)/src/libmsc.a $(top_builddir)/src/libbsc.a -ldl -ldbi