i9500: remove Samsung wpa_supplicant.conf

* This is unnecessary, the standard one works fine.
i9500: update ril header to match xmm6262 libril update from qcril
i9500: update RIL defines to allow device to sleep

* There is a pretty serious RIL wakelock otherwise.
Merge pull request #1 from intervigilium/cm-10.2

Pull request 01