another gnulib update

Gnulib just enhanced <string.h> to guarantee GNU properties, obsoleting several 
minor headers in the process.

2007-01-26  Eric Blake  <[email protected]>

	* m4/symtab.c (includes): Adjust to latest gnulib.
	* modules/m4.c (includes): Likewise.

Index: m4/symtab.c
===================================================================
RCS file: /sources/m4/m4/m4/symtab.c,v
retrieving revision 1.69
diff -u -r1.69 symtab.c
--- m4/symtab.c	31 Oct 2006 02:24:50 -0000	1.69
+++ m4/symtab.c	26 Jan 2007 23:46:39 -0000
@@ -1,5 +1,5 @@
 /* GNU m4 -- A simple macro processor
-   Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 2001, 2005, 2006
+   Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 2001, 2005, 2006, 2007
    Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
@@ -20,8 +20,6 @@
 
 #include "m4private.h"
 
-#include "strnlen.h"
-
 /* Define this to see runtime debug info.  Implied by DEBUG.  */
 /*#define DEBUG_SYM */
 
Index: modules/m4.c
===================================================================
RCS file: /sources/m4/m4/modules/m4.c,v
retrieving revision 1.101
diff -u -r1.101 m4.c
--- modules/m4.c	13 Jan 2007 13:55:37 -0000	1.101
+++ modules/m4.c	26 Jan 2007 23:46:39 -0000
@@ -23,7 +23,6 @@
 #include <errno.h>
 
 #include "stdlib--.h"
-#include "strstr.h"
 #include "tempname.h"
 #include "unistd--.h"