Bug 1021756 - Help with ro.secure=1 and ro.debuggable=1 devices

Devices that start with adb as shell rather than root fail to pass the cert:permissions test.

Should we check for such type of devices and fail if the user does not use a flag? (e.g. run.sh --run-adb-as-root)
Or should we make cert.py to always run adb as root?