Donot using '/L'(list) option for xcopy
xcopy不使用/L选项

Signed-off-by: Wanpeng Song <swpustc@mail.ustc.edu.cn>
Force checkout branch
强制检出分支

Signed-off-by: Wanpeng Song <swpustc@mail.ustc.edu.cn>
Merge branch 'sources' into projects

Signed-off-by: Wanpeng Song <swpustc@mail.ustc.edu.cn>
Revert "Removed duplicated files"

Signed-off-by: Wanpeng Song <swpustc@mail.ustc.edu.cn>
Removed duplicated files (right)
移除重复文件（正确）

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