update_on_ev3dev.rc.local

Add the next lines to the bottom of `/media/mmc_p1/ev3dev.rc.local`

```
#
# use speach to tell the available network IP addresses
#
if [ -e /media/mmc_p1/tellIP ]; then
    echo "Executing /media/mmc_p1/tellIP"
    .   /media/mmc_p1/tellIP
fi

```