[gnome-todo] flatpak: add gcr master in order to build eds

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

commit f50c981b4d6875d529df805dc4545143d41d8d0a
Author: Günther Wagner <info gunibert de>
Date:   Thu Jun 23 20:57:56 2022 +0200

    flatpak: add gcr master in order to build eds

 build-aux/flatpak/org.gnome.Todo.json | 13 +++++++++++++
 1 file changed, 13 insertions(+)
---
diff --git a/build-aux/flatpak/org.gnome.Todo.json b/build-aux/flatpak/org.gnome.Todo.json
index cfd9fc0a..0fa90d4a 100644
--- a/build-aux/flatpak/org.gnome.Todo.json
+++ b/build-aux/flatpak/org.gnome.Todo.json
@@ -109,6 +109,19 @@
                 }
             ]
         },
+        {
+            "name" : "gcr",
+            "buildsystem" : "meson",
+            "config-opts" : [
+                "-Dgtk_doc=false"
+            ],
+            "sources" : [
+                {
+                    "type" : "git",
+                    "url" : "https://gitlab.gnome.org/GNOME/gcr.git";
+                }
+            ]
+        },
         {
             "name" : "evolution-data-server",
             "cleanup": [ "/share/GConf" ],