[egs] Aishell: update run.sh with command to show all WERs (kaldi-asr#3974)

Author: zh794390558

egs/aishell/s5/run.sh

@@ -141,5 +141,6 @@ local/chain/run_tdnn.sh
 
 # getting results (see RESULTS file)
 for x in exp/*/decode_test; do [ -d $x ] && grep WER $x/cer_* | utils/best_wer.sh; done 2>/dev/null
+for x in exp/*/*/decode_test; do [ -d $x ] && grep WER $x/cer_* | utils/best_wer.sh; done 2>/dev/null
 
 exit 0;