[gnome-builder] flatpak: build intltool before polkit

[Christian Hergert <chergert src gnome org>]

commit 806263d900da0fef016f962ad2a64f8afea272f3
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jul 30 10:52:34 2019 -0700

    flatpak: build intltool before polkit
    
    Needed now that it is not part of the runtime/SDK.

 build-aux/flatpak/org.gnome.Builder.json | 11 +++++++++++
 1 file changed, 11 insertions(+)
---
diff --git a/build-aux/flatpak/org.gnome.Builder.json b/build-aux/flatpak/org.gnome.Builder.json
index 3565d9a56..466c192a0 100644
--- a/build-aux/flatpak/org.gnome.Builder.json
+++ b/build-aux/flatpak/org.gnome.Builder.json
@@ -135,6 +135,17 @@
                 }
             ]
         },
+        {
+            "name": "intltool",
+            "cleanup": [ "*" ],
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "https://launchpad.net/intltool/trunk/0.51.0/+download/intltool-0.51.0.tar.gz";,
+                    "sha256": "67c74d94196b153b774ab9f89b2fa6c6ba79352407037c8c14d5aeb334e959cd"
+                }
+            ]
+        },
         {
             "name" : "polkit",
             "config-opts" : [