status output can be uncolorized using the git config value
color.status=false (works for short status since git 1.7.0)

Change-Id: I0887ab9a02f4c98fe54a94a53ffcd4f91fef8699
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>