tools: add ndns-demo

Change-Id: I250d7bf8a02ffec8aee3226bbf830bc3e9bbfa3f
tools: add NdnsShot

Change-Id: Ia34e0228e6e9164239f3412e5c419f965e35daec
add root cert and shell script to simplify testing

Change-Id: I15171cf06f3b9b3e55909109a3bf99d2d6176a35