[PATCH] build: update gnulib submodule to latest

[Jim Meyering]

With the latest from git as well as bleeding edge gcc-4.8.0 20120829,
I see this failures:

    make[3]: Entering directory `/h/j/w/co/grep/lib'
      CC       xstrtoimax.o
    In file included from xstrtol.c:31:0,
                     from xstrtoimax.c:6:
    xstrtol.h:69:1: error: '_Noreturn' is not at beginning of declaration 
[-Werror=old-style-declaration]
     void _Noreturn xstrtol_fatal (enum strtol_error,
     ^
    cc1: all warnings being treated as errors
    make[3]: *** [xstrtoimax.o] Error 1

Updating to the latest gnulib pulls in the required fix,
so I've just done that.

>From b638925741a812f2a5cd346ca4bca46d60618d8f Mon Sep 17 00:00:00 2001
From: Jim Meyering <address@hidden>
Date: Sat, 1 Sep 2012 18:55:50 +0200
Subject: [PATCH] build: update gnulib submodule to latest

---
 gnulib | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gnulib b/gnulib
index a451aa0..1af55d8 160000
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit a451aa0d0cbbec1efae7d07eb002fd4220511a27
+Subproject commit 1af55d85d9762a679b4302d5995f05ccd883e956
--
1.7.12.146.g16d26b1