UpdateSource接口执行完时，自动安装uos-release-note包

Log: 检查更新时自动获取“系统更新”日志
Task: https://pms.uniontech.com/zentao/task-view-33100.html
Change-Id: I67c7c391220bd73ef526b23d13b3a7d37ceaa083
Reviewed-on: http://gerrit.uniontech.com/c/lastore-daemon/+/2379
Reviewed-by: <mailman@uniontech.com>
Reviewed-by: quezhiyong <quezhiyong@uniontech.com>
Tested-by: <mailman@uniontech.com>