set gpg document to lf
设置gpg文件eol为lf

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>
Merge branch 'projects' into dev-2

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