create dummy git
create a new git for external/busybox.git
init import of busybox source code.
add top for smp show, more usuful to track each core's usage.

Signed-off-by: Zhang Jiejing <jiejing.zhang@freescale.com>
ENGR00237044 Adds baud rate B3500000

For stty to set larger baud rate since uart can support up to 4M.

Signed-off-by: Jay Tu <jay.tu@freescale.com>