Revert "restorecon_recursive("/sys") speed boot time"

this causes heavy random problems on selinux timings.

This reverts commit 4c6323ed9661508aaa576a15dc8a08ef3d624abe.

Change-Id: I31d89bb699233efd7b4fcaf9f7e207e3a0feea33
Add keystore to system group

 * Required in order to request firmware for hardware implementation

Change-Id: Ibd1ba79667d4489f0972b8fba587a8ba9c6083dd
Merge remote-tracking branch 'Slim/kk4.4' into slim4.4