create dummy git
create a new git for external/powerdebug.git
ENGR00174062-1 powerdebug: import powerdebug from Linaro

import powerdebug0.6.1 from Linaro

Signed-off-by: Lin Fuzhen <fuzhen.lin@freescale.com>
ENGR00174062-2 powerdebug: fix clock display issue

Fix clock rate display issue when clock is not integer, such CPU
work at 1.2GHz but it print 1GHz;
Aadd gpio support and etc.

Signed-off-by: Lin Fuzhen <fuzhen.lin@freescale.com>
ENGR00174062-3 powerdebug:Remove ncurses lib dependency

Remove ncurses lib dependency

Signed-off-by: Lin Fuzhen <fuzhen.lin@freescale.com>