update_verifier: read dir perms

Allow update_verifier to load the boot_control_hal in passthrough mode.

Test: update_verifier works, no denials
Bug: 34656553
Change-Id: I5c20ce67c8f1fd195f2429dae497221514ed95a8
(cherry picked from commit bafa38e0cec4cc32cf135b342874c14136ab3f29)
diff --git a/public/update_verifier.te b/public/update_verifier.te
index abbc766..5ee5258 100644
--- a/public/update_verifier.te
+++ b/public/update_verifier.te
@@ -3,6 +3,9 @@
 type update_verifier, domain, boot_control_hal;
 type update_verifier_exec, exec_type, file_type;
 
+# find the boot_control_hal
+allow update_verifier system_file:dir r_dir_perms;
+
 # Allow update_verifier to reach block devices in /dev/block.
 allow update_verifier block_device:dir search;