Grant Keystrore and DRM services access to /dev/qseecom.

/dev/qseecom is the Qualcomm Secure Execution Environment
Communicator (QSEECOM) device.

Change-Id: Id4184a02451f2ea6788ad576fe3b6281cf965e72
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 4cc6a7d..6a8b328 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -98,7 +98,9 @@
 BOARD_SEPOLICY_UNION := \
        app.te \
        device.te \
+       drmserver.te \
        file_contexts \
+       keystore.te \
        surfaceflinger.te \
        system.te