update

Signed-off-by: Micky Ching <mickyching@gmail.com>
add iperf

Signed-off-by: Micky Ching <mickyching@gmail.com>
add ubifs

Signed-off-by: Micky Ching <mickyching@gmail.com>
add kernel print

Signed-off-by: Micky Ching <mickyching@gmail.com>
add davmail usage

Signed-off-by: Micky Ching <mickyching@gmail.com>