netfilter: xtables: add missing header inclusions for headers_check

Resolve these warnings on `make headers_check`:

usr/include/linux/netfilter/xt_CT.h:7: found __[us]{8,16,32,64} type
without #include <linux/types.h>
...

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

include/linux/netfilter/xt_CT.h

@@ -1,6 +1,8 @@
 #ifndef _XT_CT_H
 #define _XT_CT_H
 
+#include <linux/types.h>
+
 #define XT_CT_NOTRACK	0x1
 
 struct xt_ct_target_info {

include/linux/netfilter/xt_TCPOPTSTRIP.h

@@ -1,6 +1,8 @@
 #ifndef _XT_TCPOPTSTRIP_H
 #define _XT_TCPOPTSTRIP_H
 
+#include <linux/types.h>
+
 #define tcpoptstrip_set_bit(bmap, idx) \
 	(bmap[(idx) >> 5] |= 1U << (idx & 31))
 #define tcpoptstrip_test_bit(bmap, idx) \

include/linux/netfilter/xt_TPROXY.h

@@ -1,6 +1,8 @@
 #ifndef _XT_TPROXY_H
 #define _XT_TPROXY_H
 
+#include <linux/types.h>
+
 /* TPROXY target is capable of marking the packet to perform
  * redirection. We can get rid of that whenever we get support for
  * mutliple targets in the same rule. */

include/linux/netfilter/xt_cluster.h

@@ -1,6 +1,8 @@
 #ifndef _XT_CLUSTER_MATCH_H
 #define _XT_CLUSTER_MATCH_H
 
+#include <linux/types.h>
+
 enum xt_cluster_flags {
 	XT_CLUSTER_F_INV	= (1 << 0)
 };

include/linux/netfilter/xt_connlimit.h

@@ -1,6 +1,8 @@
 #ifndef _XT_CONNLIMIT_H
 #define _XT_CONNLIMIT_H
 
+#include <linux/types.h>
+
 struct xt_connlimit_data;
 
 enum {

include/linux/netfilter/xt_quota.h

@@ -1,6 +1,8 @@
 #ifndef _XT_QUOTA_H
 #define _XT_QUOTA_H
 
+#include <linux/types.h>
+
 enum xt_quota_flags {
 	XT_QUOTA_INVERT		= 0x1,
 };

include/linux/netfilter/xt_socket.h

@@ -1,6 +1,8 @@
 #ifndef _XT_SOCKET_H
 #define _XT_SOCKET_H
 
+#include <linux/types.h>
+
 enum {
 	XT_SOCKET_TRANSPARENT = 1 << 0,
 };

include/linux/netfilter/xt_time.h

@@ -1,6 +1,8 @@
 #ifndef _XT_TIME_H
 #define _XT_TIME_H 1
 
+#include <linux/types.h>
+
 struct xt_time_info {
 	__u32 date_start;
 	__u32 date_stop;

include/linux/netfilter/xt_u32.h

@@ -1,6 +1,8 @@
 #ifndef _XT_U32_H
 #define _XT_U32_H 1
 
+#include <linux/types.h>
+
 enum xt_u32_ops {
 	XT_U32_AND,
 	XT_U32_LEFTSH,