fix typo in wpa_cli.sh

SD_ROOT/wz_mini/bin/wpa_cli.sh

@@ -1,4 +1,4 @@
 #!/bin/sh
 
 echo 'wpa_state=COMPLETED'
-echo ip_addresss=`ifconfig wlan0 | awk '/inet / {print $2}' | awk -F: '{print $2}'`
+echo ip_address=`ifconfig wlan0 | awk '/inet / {print $2}' | awk -F: '{print $2}'`