add start.sh and untrack ext/poxdesk
add start.sh and untrack ext/poxdesk

Signed-off-by: controller02 <773acf1aa87f65d0e203b47c3118db0192a38af9@qq.com>

carlye566/IoT-POX,carlye566/IoT-POX,carlye566/IoT-POX,carlye566/IoT-POX,carlye566/IoT-POX