[gnome-games] flatpak: Pin down the Desmume and Beetle NGP commits

[Adrien Plazas <aplazas src gnome org>]

commit ce07911b7c752bc95c899f894b4081604ba2a90d
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Fri Jul 7 13:22:17 2017 +0200

    flatpak: Pin down the Desmume and Beetle NGP commits
    
    This will help Games to build until the upstream build bugs are solved.

 flatpak/libretro-cores/libretro-desmume.json      |    3 ++-
 flatpak/libretro-cores/libretro-mednafen_ngp.json |    3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/flatpak/libretro-cores/libretro-desmume.json b/flatpak/libretro-cores/libretro-desmume.json
index ed5d8c9..c1f6209 100644
--- a/flatpak/libretro-cores/libretro-desmume.json
+++ b/flatpak/libretro-cores/libretro-desmume.json
@@ -18,7 +18,8 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "https://github.com/libretro/desmume";
+                    "url": "https://github.com/libretro/desmume";,
+                    "branch": "09e0f16bf2ab6ffb3267ab27a9135867cf6320f3"
                 },
                 {
                     "type": "file",
diff --git a/flatpak/libretro-cores/libretro-mednafen_ngp.json 
b/flatpak/libretro-cores/libretro-mednafen_ngp.json
index b3f4a30..30e63fc 100644
--- a/flatpak/libretro-cores/libretro-mednafen_ngp.json
+++ b/flatpak/libretro-cores/libretro-mednafen_ngp.json
@@ -17,7 +17,8 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "https://github.com/libretro/beetle-ngp-libretro";
+                    "url": "https://github.com/libretro/beetle-ngp-libretro";,
+                    "branch": "bc52b15e7e0cba152dad1e8e24f06f3fff0c36a6"
                 },
                 {
                     "type": "file",