rootfs: introduce a test cleanup postprocess command
rootfs: introduce a test cleanup postprocess command

Some packages leave bits and pieces around on the rootfs that
aren't required and take up 20Megs+ on the final image. These
package are not easily fixed in their recipes, so we introduce
a catch all routine that will simply remove those uneeded
artifacts.

Signed-off-by: Bruce Ashfield <284cc737d174a260eec2a2a6324a304f84b1ae0f@windriver.com>

masselstine/meta-overc,OverC/meta-overc,OverC/meta-overc,masselstine/meta-overc,OverC/meta-overc,OverC/meta-overc,OverC/meta-overc,masselstine/meta-overc,masselstine/meta-overc,OverC/meta-overc