examples: bash: print errors int stderr

+ whitespace

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>

examples/shell/active-wifi.sh

@@ -76,7 +76,7 @@ show_active_ssids()
         BSSID=`get_property $ACTIVE_AP $ACCESS_POINT_IFACE "HwAddress"`
         echo "Device '$INTERFACE' is connected to '$SSID' (BSSID=$BSSID)"
       else
-        echo "No active AP on device '$INTERFACE'"
+        echo "No active AP on device '$INTERFACE'" >&2
       fi
     fi
   done

examples/shell/disconnect-device.sh

@@ -61,7 +61,7 @@ disconnect_device ()
     fi
   done
 
-  echo "Device with interface '$1' not found."
+  echo "Device with interface '$1' not found." >&2
   return 1
 }