cm: SELinux policy for persistent properties API

 * Set up persistent properties for devices with a /persist partition.

Change-Id: I78974dd4e25831338462c91fc25e36e343795510
diff --git a/sepolicy/file.te b/sepolicy/file.te
index d44a050..91b89a3 100644
--- a/sepolicy/file.te
+++ b/sepolicy/file.te
@@ -11,3 +11,6 @@
 
 # Recovery's "cache"
 type recovery_cache_file, file_type, mlstrustedobject;
+
+# Persistent property storage
+type persist_property_file, file_type;