add castcheck and dialcheck.

Utilities which can check for nearby DIAL and Cast
receivers. These will be used from the Network Box to
monitor TV Box services on the LAN.

GSAFSJ1412D0117# /tmp/castcheck
Cast responses from: 192.168.42.132 192.168.42.183
GSAFSJ1412D0117# /tmp/dialcheck
DIAL responses from: 192.168.42.10 192.168.42.132 192.168.42.147 \
     192.168.42.183 192.168.42.252 fe80::3139:322e:3136:382e \
     fe80::6665:3830:3a3a:3331 fe80::6665:3830:3a3a:3636
GSAFSJ1412D0117#

Change-Id: I09ac023a63cbccb6f692abff2c66ba84ea62b9d4
7 files changed