selinux: include the svirt_t type

The dpdk policy adds support for interacting with libvirt, but failed
to include the appropriate svirt_t type.  This results in an error
like:

    openvswitch-custom.te:53:ERROR 'unknown type svirt_t' at token ';' on line 1060:

Reported-by: Guoshuai Li <[email protected]>
Signed-off-by: Aaron Conole <[email protected]>
Acked-by: Ansis Atteka <[email protected]>

selinux/openvswitch-custom.te.in

@@ -13,6 +13,7 @@ require {
 @begin_dpdk@
         type hugetlbfs_t;
         type kernel_t;
+        type svirt_t;
         type svirt_image_t;
         type svirt_tmpfs_t;
         type vfio_device_t;