headers: add missing includes

Fixes #12125.

src/journal/journal-file.h

@@ -2,6 +2,7 @@
 #pragma once
 
 #include <inttypes.h>
+#include <sys/uio.h>
 
 #if HAVE_GCRYPT
 #  include <gcrypt.h>

src/journal/journald-context.h

@@ -2,6 +2,7 @@
 #pragma once
 
 #include <inttypes.h>
+#include <sys/socket.h>
 #include <sys/types.h>
 
 #include "sd-id128.h"

src/journal/journald-wall.h

@@ -1,6 +1,8 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
 #pragma once
 
+#include <sys/socket.h>
+
 #include "journald-server.h"
 
 void server_forward_wall(Server *s, int priority, const char *identifier, const char *message, const struct ucred *ucred);