selinux: cleanup
m7-common: basic SELinux policy

Change-Id: I4ae872ee6fcb7f43a10dc6d8dfdeda9ea27bb949
m7-common: Richer SD card permissions

Change-Id: I327c1a235a90453c32075c80f15c40f061c5c9eb
m7-common: use permissive SELinux

* Switch SELinux to permissive mode until actual policies are created.

Change-Id: I9bc8dbe54bd99cd11014964f6ae43c6114554963

Conflicts:
	BoardConfigCommon.mk