prefix sub-directories containing libraries with 'lib'
... and make sure tests work again after restructuring
diff --git a/openbsc/tests/gsm0408/Makefile.am b/openbsc/tests/gsm0408/Makefile.am
index f98c673..de6feb2 100644
--- a/openbsc/tests/gsm0408/Makefile.am
+++ b/openbsc/tests/gsm0408/Makefile.am
@@ -3,4 +3,7 @@
noinst_PROGRAMS = gsm0408_test
gsm0408_test_SOURCES = gsm0408_test.c
-gsm0408_test_LDADD = $(top_builddir)/src/libbsc.a $(top_builddir)/src/libmsc.a $(top_builddir)/src/libbsc.a $(LIBOSMOCORE_LIBS) -ldbi
+gsm0408_test_LDADD = $(top_builddir)/src/libbsc/libbsc.a \
+ $(top_builddir)/src/libmsc/libmsc.a \
+ $(top_builddir)/src/libbsc/libbsc.a \
+ $(LIBOSMOCORE_LIBS) -ldbi