When including 'wine/port.h', include it first.
Remove redundant 'config.h' includes.

diff --git a/scheduler/sysdeps.c b/scheduler/sysdeps.c
index 9073cf7..b931e77 100644
--- a/scheduler/sysdeps.c
+++ b/scheduler/sysdeps.c
@@ -4,7 +4,7 @@
  * Copyright 1998 Alexandre Julliard
  */
 
-#include "config.h"
+#include "wine/port.h"
 
 #include <signal.h>
 #include <stdio.h>
@@ -20,7 +20,6 @@
 #ifdef HAVE_UCONTEXT_H
 # include <ucontext.h>
 #endif
-#include "wine/port.h"
 #include "thread.h"
 #include "wine/server.h"
 #include "winbase.h"