[egs] thchs-30: fix Mac compatibility issue (#2258)

Author: xikunlun001

egs/thchs30/s5/local/thchs-30_data_prep.sh

@@ -21,7 +21,9 @@ for x in train dev test; do
  cd $dir/data/$x
  rm -rf wav.scp utt2spk spk2utt word.txt phone.txt text
  echo "preparing scps and text in data/$x"
- for nn in `find $corpus_dir/$x/*.wav | sort -u | xargs -i basename {} .wav`; do
+ #updated new "for loop" figured out the compatibility issue with Mac created by Xi Chen, in 03/06/2018
+ #for nn in `find $corpus_dir/$x/*.wav | sort -u | xargs -i basename {} .wav`; do
+ for nn in `find $corpus_dir/$x -name "*.wav" | sort -u | xargs -I {} basename {} .wav`; do
  spkid=`echo $nn | awk -F"_" '{print "" $1}'`
  spk_char=`echo $spkid | sed 's/\([A-Z]\).*/\1/'`
  spk_num=`echo $spkid | sed 's/[A-Z]\([0-9]\)/\1/'`