cm: policy for ipv6 tethering

 * Enable use of radish via netd for ipv6 tethering

Change-Id: Ifa0e85686fc70f59c089ca40a78cea9935820185
Merge remote-tracking branch 'CyanogenMod/cm-11.0' into cm-11.0
remove cm vendorsetup.sh

Change-Id: I19a14765176cc062701f3b424671e762fa352edb