netfilter: ipset: install ipset related header files

Signed-off-by: Patrick McHardy <kaber@trash.net>

include/linux/netfilter/Kbuild

+header-y += ipset/
+
 header-y += nf_conntrack_common.h
 header-y += nf_conntrack_ftp.h
 header-y += nf_conntrack_sctp.h
@@ -55,6 +57,7 @@ header-y += xt_quota.h
 header-y += xt_rateest.h
 header-y += xt_realm.h
 header-y += xt_recent.h
+header-y += xt_set.h
 header-y += xt_sctp.h
 header-y += xt_socket.h
 header-y += xt_state.h

include/linux/netfilter/ipset/Kbuild

+header-y += ip_set.h
+header-y += ip_set_bitmap.h
+header-y += ip_set_hash.h
+header-y += ip_set_list.h

include/linux/netfilter/xt_set.h

 #ifndef _XT_SET_H
 #define _XT_SET_H
 
+#include <linux/types.h>
 #include <linux/netfilter/ipset/ip_set.h>
 
 /* Revision 0 interface: backward compatible with netfilter/iptables */