m8: enable qcom bionic optimization, remove deprecated krait

Change-Id: I2cd81f7ce427c6e69653d4f62773c41d0c85b615
m8: set selinux permissive, remove local policies

Change-Id: I20df3cdde8dc0b2ae9b8cee01fb30ded7b5fd6f3

Conflicts:
	BoardConfig.mk
	sepolicy/device.te
	sepolicy/file_contexts
	sepolicy/init.te
	sepolicy/init_shell.te
	sepolicy/mediaserver.te
	sepolicy/rild.te
	sepolicy/ueventd.te