fix sync tips
修正同步tip

Signed-off-by: Wanpeng Song <swpustc@mail.ustc.edu.cn>
fix signture script
修正签名脚本

Signed-off-by: Wanpeng Song <swpustc@mail.ustc.edu.cn>
fix sync and signture scripts
修正同步和签名脚本
Merge branch 'dev-2'

Signed-off-by: Wanpeng Song <swpustc@mail.ustc.edu.cn>