Clean up hikey selinux policy

Remove lots of: allow xyz kernel:system module_request; as these
are almost always spurious.

Remove any labeling of directories as shell_data_file.

Remove access to default labels and properties.

Remove empty gatord domain.

Remove rules already granted in core policy.
diff --git a/sepolicy/file_contexts b/sepolicy/file_contexts
index ca1bf57..e97b068 100644
--- a/sepolicy/file_contexts
+++ b/sepolicy/file_contexts
@@ -1,9 +1,6 @@
-/data/linaro-android-kernel-test(/.*)?	u:object_r:shell_data_file:s0
-/data/linaro-android-userspace-test(/.*)?	u:object_r:shell_data_file:s0
-/data/nativebenchmark(/.*)?	u:object_r:shell_data_file:s0
-/dev/ttyAMA0   u:object_r:console_device:s0
-/dev/ttyAMA3   u:object_r:console_device:s0
+/dev/ttyAMA0           u:object_r:console_device:s0
+/dev/ttyAMA3           u:object_r:console_device:s0
 /dev/mali              u:object_r:gpu_device:s0
 /dev/dri/card0         u:object_r:gpu_device:s0
 /dev/hci_tty           u:object_r:hci_attach_dev:s0
-/system/bin/uim           u:object_r:hci_attach_exec:s0
+/system/bin/uim        u:object_r:hci_attach_exec:s0