[egs] Fix bug in kws_search.sh in babel/s5/; need to unzip results files (kaldi-asr#3950)

Author: thoshith-s

egs/babel/s5/local/kws_search.sh

@@ -144,7 +144,7 @@ if [ $stage -le 2 ]; then
   echo "Writing normalized results"
   $cmd LMWT=$min_lmwt:$max_lmwt $kwsoutdir/write_normalized.LMWT.log \
     set -e ';' set -o pipefail ';'\
-    cat ${kwsoutdir}_LMWT/result.* \| \
+    gunzip -c ${kwsoutdir}_LMWT/result.* \| \
       utils/write_kwslist.pl  --Ntrue-scale=$ntrue_scale --flen=0.01 --duration=$duration \
         --segments=$datadir/segments --normalize=true --duptime=$duptime --remove-dup=true\
         --map-utter=$kwsdatadir/utter_map --digits=3 \
@@ -155,7 +155,7 @@ if [ $stage -le 3 ]; then
   echo "Writing unnormalized results"
   $cmd LMWT=$min_lmwt:$max_lmwt $kwsoutdir/write_unnormalized.LMWT.log \
     set -e ';' set -o pipefail ';'\
-    cat ${kwsoutdir}_LMWT/result.* \| \
+    gunzip -c ${kwsoutdir}_LMWT/result.* \| \
         utils/write_kwslist.pl --Ntrue-scale=$ntrue_scale --flen=0.01 --duration=$duration \
           --segments=$datadir/segments --normalize=false --duptime=$duptime --remove-dup=true\
           --map-utter=$kwsdatadir/utter_map \