dbus: Allow sock_file labelled as session_dbusd_tmp_t

The DBus session socket fallback location is /tmp/dbus-RANDOM.
https://github.com/freedesktop/dbus/blob/ef55a3db0d8f17848f8a579092fb05900cc076f5/configure.ac#L1641

Signed-off-by: Jason Zaman <perfinion@gentoo.org>

Author: perfinion

policy/modules/services/dbus.if

@@ -96,6 +96,7 @@ template(`dbus_role_template',`
 	allow $3 { session_dbusd_home_t session_dbusd_tmp_t }:dir { manage_dir_perms relabel_dir_perms };
 	allow $3 { session_dbusd_home_t session_dbusd_tmp_t }:file { manage_file_perms relabel_file_perms };
 	allow $3 session_dbusd_runtime_t:sock_file { manage_sock_file_perms relabel_sock_file_perms };
+	allow $3 session_dbusd_tmp_t:sock_file { manage_sock_file_perms relabel_sock_file_perms };
 	userdom_user_home_dir_filetrans($3, session_dbusd_home_t, dir, ".dbus")
 
 	domtrans_pattern($3, dbusd_exec_t, $1_dbusd_t)