得到arduino.IDE文件根路径
arduino.金宝appsupportpkg.getavrlibraryroot.
|arduino.金宝appsupportpkg.getavrroot.
|arduino.金宝appsupportpkg.getBoardInfo.
|arduino.金宝appsupportpkg.getlibraryroot.
|arduino.金宝appsupportpkg.getsamdlibraryroot.
|arduino.金宝appsupportpkg.getsamdroot.
|arduino.金宝appsupportpkg.getsamlibraryroot.
|arduino.金宝appsupportpkg.getsamroot.