[polari] flatpak: add autoconf-archive as a dependency

[Christian Hergert <chergert src gnome org>]

commit 6d1d43640f2e77706e24130944ae28488226d1a7
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jan 11 13:08:01 2017 -0800

    flatpak: add autoconf-archive as a dependency
    
    Polari requires some m4 macros which are not installed in-tree. Therefore,
    they need to be installed before the build of Polari can continue.

 org.gnome.Polari.json |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)
---
diff --git a/org.gnome.Polari.json b/org.gnome.Polari.json
index ff570e1..81a1522 100644
--- a/org.gnome.Polari.json
+++ b/org.gnome.Polari.json
@@ -33,10 +33,21 @@
     },
     "cleanup": ["/include","/libexec","/lib/*.la","/lib/*.a",
                 "/lib/pkgconfig","/lib/polari/*.la",
-                "/share/aclocal", "/share/gir-1.0", "/share/gtk-doc"
+                "/share/aclocal", "/share/autoconf-archive",
+                "/share/gir-1.0", "/share/gtk-doc"
     ],
     "modules": [
         {
+            "name": "autoconf-archive",
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "http://ftpmirror.gnu.org/autoconf-archive/autoconf-archive-2016.09.16.tar.xz";,
+                    "sha256": "e8f2efd235f842bad2f6938bf4a72240a5e5fcd248e8444335e63beb60fabd82"
+                }
+            ]
+        },
+        {
             "name": "telepathy-glib",
             "sources": [
                 {