make clean: fix

When running 'make clean' from the top dir, the following error happens:

 make[3]: Leaving directory `/vz/kir/git/criu/test/zdtm/live/static'
 make[2]: Leaving directory `/vz/kir/git/criu/test/zdtm/live'
 set -e; for d in lib live; do make -C $d cleanout; done
 make[2]: Entering directory `/vz/kir/git/criu/test/zdtm/lib'
 make[2]: *** No rule to make target `cleanout'.  Stop.
 make[2]: Leaving directory `/vz/kir/git/criu/test/zdtm/lib'
 make[1]: *** [cleanout] Error 2
 make[1]: Leaving directory `/vz/kir/git/criu/test/zdtm'
 make: *** [clean] Error 2

Fix by adding dummy cleanout target to test/zdtm/lib/Makefile
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm/lib/Makefile

@@ -26,9 +26,12 @@ clean:
 cleandep:
 	$(RM) -f $(LIBDEP)
 
+cleanout:
+	@true
+
 realclean:	clean cleandep
 
-.PHONY:	clean cleandep realclean
+.PHONY:	clean cleandep cleanout realclean
 
 ifeq ($(filter-out no-deps-targets, $(MAKECMDGOALS)),)
 -include $(LIBDEP)