Revert "Set SELinux as permisive again."

This reverts commit bc2727ff255c3d2b24caf4a137c416261983fab0.
Revert "Merge commit 'refs/changes/36/5736/3' of https://gerrit.slimroms.net/SlimRoms/kernel_samsung_smdk4412 into HEAD"

This reverts commit 05d5bb111153d35ad0813d130a16b10c846a0af2, reversing
changes made to bc2727ff255c3d2b24caf4a137c416261983fab0.