tests: use -no-install libtool flag to avoid ./lt-* scripts

This ensures that the rpath of the generated binaries is set to use only
the just-compiled so-files and not any system-wide installed libraries
while avoiding the ugly shell script wrapper.

Change-Id: I92c7391631becc09d277981179c23f2e4dba3b54
diff --git a/src/tests/Makefile.am b/src/tests/Makefile.am
index 493bc18..72a3300 100644
--- a/src/tests/Makefile.am
+++ b/src/tests/Makefile.am
@@ -3,6 +3,8 @@
 	$(OSMOVTY_CFLAGS) $(OSMOCORE_CFLAGS) $(OSMOGSM_CFLAGS) \
 	$(OSMONETIF_CFLAGS) $(ASN1C_CFLAGS) $(OSMOSIGTRAN_CFLAGS)
 
+AM_LDFLAGS = -no-install
+
 COMMON_LIBS = $(OSMOVTY_LIBS) $(OSMOCORE_LIBS) $(OSMOGSM_LIBS) $(ASN1C_LIBS) $(OSMOSIGTRAN_LIBS) -lsctp
 
 check_PROGRAMS = test-ranap test-helpers test-hnbap hnb-test #dummy-cn