Allow dumpstate to open and read linkerconfig directory

To include linkerconfig results into dumpstate, dumpstate needs extra
permission on lnkerconfig directory to search all items within the
directory. This change allows dumpstate to have extra access on
linkerconfig directory.

Bug: 148840832
Test: tested from cuttlefish
Change-Id: I955b54ec2cc3d1dcedaa34406e0e0776b6ac12f6
diff --git a/public/dumpstate.te b/public/dumpstate.te
index 824be5d..d501670 100644
--- a/public/dumpstate.te
+++ b/public/dumpstate.te
@@ -295,6 +295,9 @@
 # Allow dumpstate to run ss
 allow dumpstate { domain pdx_channel_socket_type pdx_endpoint_socket_type }:socket_class_set getattr;
 
+# Allow dumpstate to read linkerconfig directory
+allow dumpstate linkerconfig_file:dir { read open };
+
 # For when dumpstate runs df
 dontaudit dumpstate {
   mnt_vendor_file