ui: show ages in the originator's timezone

This affects the tooltip showing the full time and the case when a date
is sufficiently old to be shown in full rather than as an offset.

Signed-off-by: John Keeping <john@keeping.me.uk>

ui-repolist.c

@@ -79,7 +79,7 @@ static void print_modtime(struct cgit_repo *repo)
 {
 	time_t t;
 	if (get_repo_modtime(repo, &t))
-		cgit_print_age(t, -1);
+		cgit_print_age(t, 0, -1);
 }
 
 static int is_match(struct cgit_repo *repo)