[sushi] Fix the build with automake 1.13

[Cosimo Cecchi <cosimoc src gnome org>]

commit bec6e9be7fc8113de3e524caa34f6c7f38195e40
Author: Nuno Araujo <nuno araujo russo79 com>
Date:   Sat Jan 19 11:23:04 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=692117

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 0ce8981..e8f5385 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ dnl -*- mode: m4 -*-
 AC_PREREQ(2.63)
 AC_INIT([sushi],[3.7.4],[],[sushi])
 
-AM_CONFIG_HEADER(config/config.h)
+AC_CONFIG_HEADERS([config/config.h])
 AC_CONFIG_SRCDIR([src/main.c])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_AUX_DIR([config])