drop unneccessary duplicate linking: tests/gsm0408

Change-Id: I8b6fb27d1db0157cb7d61f18b03f33c4f3168946
Reviewed-on: https://gerrit.osmocom.org/90
Tested-by: Jenkins Builder
Reviewed-by: Holger Freyther <holger@freyther.de>
diff --git a/openbsc/tests/gsm0408/Makefile.am b/openbsc/tests/gsm0408/Makefile.am
index ee04102..79fb9f1 100644
--- a/openbsc/tests/gsm0408/Makefile.am
+++ b/openbsc/tests/gsm0408/Makefile.am
@@ -8,6 +8,5 @@
 gsm0408_test_LDADD =	$(top_builddir)/src/libbsc/libbsc.a \
 			$(top_builddir)/src/libmsc/libmsc.a \
 			$(top_builddir)/src/libtrau/libtrau.a \
-			$(top_builddir)/src/libbsc/libbsc.a \
 			$(top_builddir)/src/libcommon/libcommon.a \
 			$(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS) $(LIBOSMOABIS_LIBS) -ldbi