[gnome-todo] build: Check for the APPSTREAM_XML macro

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 355964aabd3a6fa506f298592708a74c681a7b0f
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Jul 21 10:20:16 2015 +0100

    build: Check for the APPSTREAM_XML macro
    
    Use AX_REQUIRE_DEFINED from autoconf-archive.

 configure.ac |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 50b5ad1..9293eb5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,8 +21,6 @@ GETTEXT_PACKAGE=AC_PACKAGE_TARNAME
 AC_SUBST(GETTEXT_PACKAGE)
 AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE,"$GETTEXT_PACKAGE", [GETTEXT package name])
 
-AM_GLIB_GNU_GETTEXT
-
 ## don't rerun to this point if we abort
 AC_CACHE_SAVE
 
@@ -38,6 +36,10 @@ LT_INIT([disable-static])
 AC_CACHE_SAVE
 
 GLIB_GSETTINGS
+AM_GLIB_GNU_GETTEXT
+
+# We require additional macros
+AX_REQUIRE_DEFINED([APPSTREAM_XML])
 
 dnl ================================================================
 dnl Misc