[libcroco] build: add support for automake 1.13

[Christian Persch <chpe src gnome org>]

commit c143b97c8aef44205ae4601c3284436379eba078
Author: Nuno Araujo <nuno araujo russo79 com>
Date:   Wed Jan 16 00:01:13 2013 +0100

    build: add support for 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.
    
    Bug #692111.

 configure.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.in b/configure.in
index a44fefa..136e76d 100644
--- a/configure.in
+++ b/configure.in
@@ -5,7 +5,7 @@ AC_CONFIG_SRCDIR([src/cr-input.c])
 AC_CANONICAL_HOST
 
 AM_INIT_AUTOMAKE([1.9 no-dist-gzip dist-bzip2])
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS([config.h])
 
 if test -z "$enable_maintainer_mode"; then
   enable_maintainer_mode=yes