added new seandroid rule to location domain

Allow GTP task to read updated RFS path in /persist
types of access granted to location domain:
    persist_file:dir r_dir_perms

Change-Id: I052c3dc9da840e4af79ce6ab77aea997d95f126d
CRs-fixed: 911752
diff --git a/common/location.te b/common/location.te
index f52ddd9..f7cc6fc 100644
--- a/common/location.te
+++ b/common/location.te
@@ -38,6 +38,7 @@
 dontaudit location domain:dir r_dir_perms;
 r_dir_file(location, netmgrd)
+allow location persist_file:dir r_dir_perms;
 #Allow access to netmgrd socket