Make wpa_supplicant oneshot.

Should fix tethering.

framework/base 0685af39ebaa5f1666007f86b5941037363116b6 broke it initially.

Change-Id: Ida0c54459debe412114bc2ce3d45833f7607866b
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_lge_g2-common into cm-11.0