uapi: add mpls_iptunnel.h

Add missing rule to export mpls iptunnel header needed by iproute2

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed