Make ping enforcing.

Change-Id: Ib43bc4027e74660f653ec90335741acc792739da
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
diff --git a/ping.te b/ping.te
index 9adf079..65612f6 100644
--- a/ping.te
+++ b/ping.te
@@ -1,5 +1,4 @@
 type ping, domain;
-permissive ping;
 type ping_exec, exec_type, file_type;
 domain_auto_trans(shell, ping_exec, ping)