[libgsystem] fileutils: #define _GNU_SOURCE so we actually get O_NOATIME

[Colin Walters <walters src gnome org>]

commit 5ed135b8f56a4a7d085a7fa144fdc59131ba8d51
Author: Colin Walters <walters verbum org>
Date:   Mon Aug 27 17:29:11 2012 -0400

    fileutils: #define _GNU_SOURCE so we actually get O_NOATIME

 gsystem-file-utils.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gsystem-file-utils.c b/gsystem-file-utils.c
index dbc5bc8..3064616 100644
--- a/gsystem-file-utils.c
+++ b/gsystem-file-utils.c
@@ -21,6 +21,8 @@
 
 #include "config.h"
 
+#define _GNU_SOURCE
+
 #include "libgsystem.h"
 #include <glib/gstdio.h>
 #include <gio/gunixinputstream.h>