remote-mediawiki: process namespaces in order

Ideally, we'd process them in numeric order since that is more
logical, but we can't do that yet since this is where we find the
numeric identifiers in the first place. Lexicographic order is a good
compromise.

Signed-off-by: Antoine Beaupré <anarcat@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/mw-to-git/git-remote-mediawiki.perl

@@ -263,7 +263,7 @@ sub get_mw_tracked_categories {
 
 sub get_mw_tracked_namespaces {
     my $pages = shift;
-    foreach my $local_namespace (@tracked_namespaces) {
+    foreach my $local_namespace (sort @tracked_namespaces) {
         my $namespace_id;
         if ($local_namespace eq "(Main)") {
             $namespace_id = 0;