d2-common : Enable SELinux

Change-Id: I95ce6702f6327f68f33db9b92691299669f69c24
Merge remote-tracking branch 'upstream/cm-10.2' into HEAD

Conflicts:
	BoardConfigCommon.mk
	sepolicy/file_contexts

Change-Id: I9abef0ba3f5da45c69e37a5f31061821a12a0e6c