update Todo-list.txt

using a more readable format

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
code indent unify

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
update TODO-list.txt

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
printf basic function support

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
temp save