docs-xml: Sort input file list
because filesystems return entries in undeterministic order
and that ends up in index.xml and influences index.html
preventing reproducible builds of samba packages (e.g. for openSUSE)
See https://reproducible-builds.org/ for why this matters
Signed-off-by: Bernhard M. Wiedemann <bwiedemann@suse.de>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Tue Jun 27 16:56:06 CEST 2017 on sn-devel-144