lib: BUGFIX: cross-compilation support

There actually was NO cross-compilation support, now user can use --host
and --build options for configure.

Author: rkrejci

Makefile.in

@@ -150,7 +150,7 @@ tarball: $(SRCS) $(HEADERS)
 	@for i in $(SUBDIRS) ; do $(MAKE) -C $$i tarball-prepare; done; \
 	for i in $(SRCS) $(HDRS_PUBL) $(HDRS_PRIV) configure.in configure \
 	    Makefile.in VERSION $(NAME).spec.in $(NAME).pc.in install-sh \
-	    Doxyfile doc/img/cesnet-logo-125.png; do \
+	    config.sub config.guess Doxyfile doc/img/cesnet-logo-125.png; do \
 	    [ -d $(NAME)-$(VERSION)/$$(dirname $$i) ] || (mkdir -p $(NAME)-$(VERSION)/$$(dirname $$i)); \
 		cp $$i $(NAME)-$(VERSION)/$$i; \
 	done;