Fix up building of vcl.7 man page

Make the vcl.7 man page hopefully build with BSD make.


git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@5487 d4fa192b-c00b-0410-8231-f00ffab90ce4

man/Makefile.am

@@ -5,7 +5,7 @@ dist_man_MANS = vcl.7
 vcl.7: $(top_srcdir)/doc/sphinx/reference/vcl.rst \
 	$(top_srcdir)/bin/varnishd/default.vcl
 if HAVE_RST2MAN
-	${RST2MAN} $< >$@
+	${RST2MAN} $(top_srcdir)/doc/sphinx/reference/vcl.rst $@
 else
 	@echo "========================================"
 	@echo "You need rst2man installed to make dist"