message: Switch Windows CI mxe distribution to mirror
  and still down
diff: sudo apt-get update
  -echo "deb http://pkg.mxe.cc/repos/apt/debian wheezy main" \
  - | sudo tee /etc/apt/sources.list.d/mxeapt.list
  -sudo apt-key adv --keyserver x-hkp://keys.gnupg.net \
  - --recv-keys D43A795B73B16ABE9643FE1AFD8FFF16DB45C6AB
  +#echo "deb http://pkg.mxe.cc/repos/apt/debian wheezy main" \
  +# | sudo tee /etc/apt/sources.list.d/mxeapt.list
  +#sudo apt-key adv --keyserver x-hkp://keys.gnupg.net \
  +# --recv-keys D43A795B73B16ABE9643FE1AFD8FFF16DB45C6AB
  +sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 86B72ED9
  +sudo add-apt-repository 'deb [arch=amd64] http://mirror.mxe.cc/repos/apt trusty main'
  sudo apt-get update
  