得到ArduinoSAMD文件的根路径
arduino.金宝appsupportpkg.getAVRLibraryRoot
|arduino.金宝appsupportpkg.getAVRRoot
|arduino.金宝appsupportpkg.getBoardInfo
|arduino.金宝appsupportpkg.getIDERoot
|arduino.金宝appsupportpkg.getLibraryRoot
|arduino.金宝appsupportpkg.getSAMDLibraryRoot
|arduino.金宝appsupportpkg.getSAMLibraryRoot
|arduino.金宝appsupportpkg.getSAMRoot