[grilo-plugins] build: Fix the build with automake 1.13

[Juan A. Suarez Romero <jasuarez src gnome org>]

commit 7f6c3e637affeab5be51d1f290bc508ecffb1e3b
Author: Nuno Araujo <nuno araujo russo79 com>
Date:   Sat Jan 19 11:28:18 2013 +0100

    build: 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=692118

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 07b73a3..2689d21 100644
--- a/configure.ac
+++ b/configure.ac
@@ -19,7 +19,7 @@ AM_INIT_AUTOMAKE([foreign])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([src])
 
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS(config.h)
 
 AC_PROG_CC
 AC_PROG_INSTALL