Don't depend on translation sub directories

just create them. Otherwise their date messes up the man page
genenration and triggers a rebuild when on wanted (e.g. when building
form the tar ball)

Resolves: rpm-software-management#1729

docs/man/Makefile.am

@@ -87,7 +87,7 @@ man_sk_man8_DATA = sk/rpm.8
 EXTRA_DIST += sk/rpm.8.md
 EXTRA_DIST += sk/rpm.8
 
-%: $(srcdir)/%.md fr ja ko pl ru sk
+%: $(srcdir)/%.md
 	@$(MKDIR_P) `dirname $@`
 	${PANDOC} -s -t man $(srcdir)/$@.md -o $@