[scripts] fix_data_dir.sh in perturb_data_dir_speed.sh (kaldi-asr#4614)

* fix_data_dir.sh used in perturb_data_dir_speed.sh

fixes the dataset directory before checking it.

* fix_data_dir.sh used in perturb_data_dir_speed.sh

fixes the dataset directory before checking it. Otherwise an error is thrown about not sorting files in validate.

egs/wsj/s5/utils/perturb_data_dir_speed.sh

@@ -145,5 +145,5 @@ cat $srcdir/reco2dur | utils/apply_map.pl -f 1 $destdir/reco_map  | \
 
 rm $destdir/spk_map $destdir/utt_map $destdir/reco_map 2>/dev/null
 echo "$0: generated speed-perturbed version of data in $srcdir, in $destdir"
-
+utils/fix_data_dir.sh $destdir
 utils/validate_data_dir.sh --no-feats --no-text $destdir