Don't call update-po in make dist

This is causing the bulk of the conflicts I have during distcheck,
and is not really necessary.

po-properties/Makefile.in.in

@@ -184,7 +184,7 @@ maintainer-clean: distclean
 	rm -f $(GMOFILES)
 
 distdir = ../$(GETTEXT_PACKAGE)-$(VERSION)/$(subdir)
-dist distdir: update-po $(DISTFILES)
+dist distdir: $(DISTFILES)
 	dists="$(DISTFILES)"; \
 	for file in $$dists; do \
 	  ln $(srcdir)/$$file $(distdir) 2> /dev/null \