shell.te: allow pulling the currently running SELinux policy

Allow pulling the currently running SELinux policy for CTS.

Change-Id: I82ec03724a8e5773b3b693c4f39cc7b5c3ae4516

shell.te

@@ -98,6 +98,10 @@ allow shell domain:{ file lnk_file } { open read getattr };
 # allow shell to read /proc/pid/attr/current for ps -Z
 allow shell domain:process getattr;
 
+# Allow pulling the SELinux policy for CTS purposes
+allow shell selinuxfs:dir r_dir_perms;
+allow shell selinuxfs:file r_file_perms;
+
 # enable shell domain to read/write files/dirs for bootchart data
 # User will creates the start and stop file via adb shell
 # and read other files created by init process under /data/bootchart