lib/libc/arch/mips/gen/_lwp.c: Sort includes.

No functional change intended.

Preparation for:

PR kern/59327: user stack pointer is not aligned properly

Author: riastradh

lib/libc/arch/mips/gen/_lwp.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: _lwp.c,v 1.9 2024/11/30 01:04:03 christos Exp $	*/
+/*	$NetBSD: _lwp.c,v 1.10 2025/04/24 23:56:50 riastradh Exp $	*/
 
 /*
  * Copyright (c) 2001 The NetBSD Foundation, Inc.
@@ -31,14 +31,16 @@
 
 #include <sys/cdefs.h>
 #if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: _lwp.c,v 1.9 2024/11/30 01:04:03 christos Exp $");
+__RCSID("$NetBSD: _lwp.c,v 1.10 2025/04/24 23:56:50 riastradh Exp $");
 #endif /* LIBC_SCCS and not lint */
 
 #include "namespace.h"
+
 #include <sys/types.h>
-#include <ucontext.h>
+
 #include <lwp.h>
 #include <stdlib.h>
+#include <ucontext.h>
 
 #include <machine/lwp_private.h>