add wiringpi library setup shell script

guowenxue

2019-07-16 185663a2a65086e73b3e15821bd2fb6344ebd475

add wiringpi library setup shell script

 tools/setup_wiringPi.sh

New file
@@ -0,0 +1,17 @@
#!/bin/bash
# This shell script used to install wiringPi library

gpio -v > /dev/null 
if [ $? == 0 ] ; then
    echo "wiringPi library already installed, exit now..."
    exit;
fi

if [ ! -d wiringPi ] ; then
    git clone git://git.drogon.net/wiringPi 
fi

cd wiringPi 
git pull origin
./build