defconfig: msm8960: Enable SELinux and its dependencies

To have more control over the access rights for different
user space needs SELinux imposes mandatory access controls
on Linux. Which allows an administrator of a system to
define how applications and users can access different
resources such as files, devices, networks and inter-process
communication.

Change-Id: Id59c69a5176c064df1dfad5f8f4a5c236460db57
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>