SELinux policy: let ueventd search SDCard dir

Change-Id: I86f91f3432f6757d346db8bd1fcea7890e79730f
diff --git a/sepolicy/ueventd.te b/sepolicy/ueventd.te
index 644d3e6..9f734f4 100644
--- a/sepolicy/ueventd.te
+++ b/sepolicy/ueventd.te
@@ -1,3 +1,4 @@
+allow ueventd sdcard_external:dir search;
 allow ueventd sdcard_external:file r_file_perms;
 allow ueventd wifi_data_file:dir search;
 allow ueventd wifi_data_file:file r_file_perms;