[gnome-games/wip/exalm/n64: 126/129] flatpak: Use opengl branch of retro-gtk

[Alexander Mikhaylenko <alexm src gnome org>]

commit 425e06282e8227ea9bb3c668449d986d0f5b49c8
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Sat Feb 1 02:39:10 2020 +0500

    flatpak: Use opengl branch of retro-gtk

 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 6a426313..30b7fce7 100644
--- a/flatpak/org.gnome.Games.json
+++ b/flatpak/org.gnome.Games.json
@@ -225,7 +225,8 @@
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://gitlab.gnome.org/GNOME/retro-gtk.git";
+                    "url" : "https://gitlab.gnome.org/exalm/retro-gtk.git";,
+                    "branch" : "wip/exalm/opengl"
                 }
             ]
         },