Allow dumpstate to read /data/tombstones.

Change-Id: Iad32cfb4d5b69176fc551b8339d84956415a4fe7
diff --git a/dumpstate.te b/dumpstate.te
index 242cb93..481feba 100644
--- a/dumpstate.te
+++ b/dumpstate.te
@@ -97,6 +97,10 @@
 allow dumpstate net_data_file:dir search;
 allow dumpstate net_data_file:file r_file_perms;
 
+# Access /data/tombstones.
+allow dumpstate tombstone_data_file:dir r_dir_perms;
+allow dumpstate tombstone_data_file:file r_file_perms;
+
 service_manager_local_audit_domain(dumpstate)
 auditallow dumpstate {
     service_manager_type