Do not allow reading all directories for the CTS.

The test gracefully handles unreadable directories, so
we do not need to allow this for all file types.

Change-Id: Ib5f5be7cacc3f0270b72c046200cc3d21f3fc374
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>

cts.te

@@ -16,7 +16,6 @@ dontaudit appdomain appdomain:dir r_dir_perms;
 dontaudit appdomain appdomain:file r_file_perms;
 
 # Walk the file tree, stat any file.
-allow appdomain file_type:dir r_dir_perms;
 allow appdomain fs_type:dir r_dir_perms;
 allow appdomain dev_type:dir r_dir_perms;
 allow appdomain file_type:dir_file_class_set getattr;