- enforce utf8 for cache file

deep_fixitycheck.pl

@@ -71,7 +71,7 @@ sub searching_ie_files ($$) {
     if (-f && m/V(\d+)-IE\d+\.xml$/) {
       my $version = $1;
       my $file=$File::Find::name;
-      $tmp_ies_unsorted_path->append( $file."\n");
+      $tmp_ies_unsorted_path->append_utf8( $file."\n");
       $cnt_unsorted_files++;
       $File::Find::prune =1;
     } elsif (-d ) {