SELinux policy: let vold setsched of kernel processes.

Change-Id: I2b7bf3037c94de4fecf3c3081497e0ac1dfef8a9
diff --git a/vold.te b/vold.te
index b0f790d..95865fb 100644
--- a/vold.te
+++ b/vold.te
@@ -56,6 +56,9 @@
 # Create and mount on /data/tmp_mnt.
 allow vold system_data_file:dir { rw_dir_perms mounton };
 
+# Set scheduling policy of kernel processes
+allow vold kernel:process setsched;
+
 # Property Service
 allow vold vold_prop:property_service set;