[gnome-games/wip/exalm/330tracker] flatpak: Pin down Tracker branch

[Alexander Mikhaylenko <alexm src gnome org>]

commit 9e32b175f0c548e9be4d35df40a1275132f849a3
Author: Alexander Mikhaylenko <exalm7659 gmail com>
Date:   Tue Sep 11 16:57:39 2018 +0500

    flatpak: Pin down Tracker branch
    
    Tracker has moved to Meson in master branch. Since Games 3.30 is going
    to use stable version, switch it to stable branch temporarily.

 flatpak/org.gnome.Games.json | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/flatpak/org.gnome.Games.json b/flatpak/org.gnome.Games.json
index 49abae90..05d3dac8 100644
--- a/flatpak/org.gnome.Games.json
+++ b/flatpak/org.gnome.Games.json
@@ -103,7 +103,8 @@
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://gitlab.gnome.org/GNOME/tracker.git";
+                    "url" : "https://gitlab.gnome.org/GNOME/tracker.git";,
+                    "branch" : "tracker-2.1"
                 }
             ]
         },