Add more permission for linkerconfig

Additional permission is required for linkerconfig from domain to get
access to ld.config.txt file from linker. This change allows linker to
get /dev/linkerconfig/ld.config.txt

Bug: 138920271
Test: m -j && confirmed from cuttlefish
Change-Id: Id130a072add8ae82840b0b4d9e997e146f502124
diff --git a/private/domain.te b/private/domain.te
index 8f7a1e0..81a4550 100644
--- a/private/domain.te
+++ b/private/domain.te
@@ -83,6 +83,7 @@
 ')
 
 # Allow access to linkerconfig file
+allow domain linkerconfig_file:dir search;
 allow domain linkerconfig_file:file r_file_perms;
 
 # Limit ability to ptrace or read sensitive /proc/pid files of processes