[libgnome-keyring] Fix the build with automake 1.13

[Stefan Walter <stefw src gnome org>]

commit 1b6e984168e9663901a2ae314575c1a3849ff381
Author: Nuno Araujo <nuno araujo russo79 com>
Date:   Mon Jan 14 18:40:31 2013 +0100

    Fix the build with automake 1.13
    
    In Automake 1.13, the long-deprecated macro AM_CONFIG_HEADER (deprecated
    since 2002) has been removed in favour of AC_CONFIG_HEADERS.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=691343

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 37b6a74..e90d592 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,7 +3,7 @@ AC_CONFIG_SRCDIR([library/gnome-keyring.h])
 AM_INIT_AUTOMAKE([tar-ustar])
 AC_CONFIG_MACRO_DIR([build/m4])
 
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS(config.h)
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
 AM_SANITY_CHECK