add fess-crawler.log

.travis/before_script.sh

@@ -7,7 +7,7 @@ tail $TMP_FILE
 ./fess-*/bin/fess 2>&1 > $TMP_FILE &
 sleep 3
 tail $TMP_FILE
-touch ./fess-*/logs/fess-crawler.log
+touch `ls -d ./fess-*`/logs/fess-crawler.log
 tail -f ./fess-*/logs/*.log &
 
 counter=0