Change save_cmnos_printf type to function pointer

save_cmnos_printf is always used as a function pointer
and never as integer

Signed-off-by: Eugene Krasnikov <k.eugene.e@gmail.com>
Do not remove bin dir

Signed-off-by: Eugene Krasnikov <k.eugene.e@gmail.com>
Merge pull request #12 from KrasnikovEugene/master

Build warning fix