libcacard: Don't link with all libraries QEMU links to

As described in https://bugzilla.redhat.com/show_bug.cgi?id=987441 ,
libcacard currently links to all the libraries QEMU is linking to,
including glusterfs libraries, libiscsi, ... libcacard does not need all of
these. This patch ensures it's only linked with the libraries it needs.

Signed-off-by: Christophe Fergeau <cfergeau@redhat.com>
Signed-off-by: Alon Levy <alevy@redhat.com>

libcacard/Makefile

@@ -25,7 +25,7 @@ vscclient$(EXESUF): libcacard/vscclient.o libcacard.la
 
 libcacard.la: LDFLAGS += -rpath $(libdir) -no-undefined \
 	-export-syms $(SRC_PATH)/libcacard/libcacard.syms
-libcacard.la: LIBS += $(libcacard_libs)
+libcacard.la: LIBS = $(libcacard_libs)
 libcacard.la: $(libcacard-lobj-y)
 	$(call LINK,$^)