libcacard: actually use symbols file

libtool has an argument for .syms file, which is -export-symbols.
There's no argument `-export-syms', and it looks like at least on
linux, -export-syms is just ignored.  Use the correct argument,
-export-symbols, to actually get the right export list.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Alon Levy <alevy@redhat.com>
Tested-by: Alon Levy <alevy@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

libcacard/Makefile

@@ -18,7 +18,7 @@ vscclient$(EXESUF): libcacard/vscclient.o libcacard.la
 # Rules for building libcacard standalone library
 
 libcacard.la: LDFLAGS += -rpath $(libdir) -no-undefined \
-	-export-syms $(SRC_PATH)/libcacard/libcacard.syms
+	-export-symbols $(SRC_PATH)/libcacard/libcacard.syms
 libcacard.la: $(libcacard-lobj-y)
 	$(call LINK,$^)