掌機 - PicoSystem - Build picosystem

參考資料：
https://github.com/32blit/32blit-sdk

$ sudo chmod 0777 /opt
$ cd /opt
$ git clone https://github.com/pimoroni/picosystem
$ mkdir picosystem/build
$ cd picosystem/build
$ cmake .. -DPICO_SDK_PATH=/opt/pico-sdk
$ make -j8
$ sudo make install