msm8974: Call qcom sepolicy.mk

Change-Id: I03d9661391bae7e057dce9041d7143a168fd98a6
msm8974: Update GPS parameters

 * Switch to IZat cloud servers, enable GLONASS

Change-Id: Ia587d776e281bd0febef7ae7e549c7e0f22e2db9
msm8974: Selinux: Fix up device-specific policies

Change-Id: I095b42605c0907cde080452c52caa4cc283313ef