netfilter: missing module license in the nf_reject_ipvX modules

[   23.545204] nf_reject_ipv4: module license 'unspecified' taints kernel.

Fixes: c8d7b98 ("netfilter: move nf_send_resetX() code to nf_reject_ipvX modules")
Reported-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/net/ipv4/netfilter/nf_reject_ipv4.c b/net/ipv4/netfilter/nf_reject_ipv4.c
index b023b4e..92b303d 100644
--- a/net/ipv4/netfilter/nf_reject_ipv4.c
+++ b/net/ipv4/netfilter/nf_reject_ipv4.c
@@ -6,6 +6,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/module.h>
 #include <net/ip.h>
 #include <net/tcp.h>
 #include <net/route.h>
@@ -125,3 +126,5 @@
 	kfree_skb(nskb);
 }
 EXPORT_SYMBOL_GPL(nf_send_reset);
+
+MODULE_LICENSE("GPL");
diff --git a/net/ipv6/netfilter/nf_reject_ipv6.c b/net/ipv6/netfilter/nf_reject_ipv6.c
index 5f5f043..20d9def 100644
--- a/net/ipv6/netfilter/nf_reject_ipv6.c
+++ b/net/ipv6/netfilter/nf_reject_ipv6.c
@@ -5,6 +5,8 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
+
+#include <linux/module.h>
 #include <net/ipv6.h>
 #include <net/ip6_route.h>
 #include <net/ip6_fib.h>
@@ -161,3 +163,5 @@
 		ip6_local_out(nskb);
 }
 EXPORT_SYMBOL_GPL(nf_send_reset6);
+
+MODULE_LICENSE("GPL");