[gnome-games] flatpak: Switch to meson

[Adrien Plazas <aplazas src gnome org>]

commit 7d785c1eedf1e9f92bd17e8b8516ab84cd0cda8b
Author: Alexander Mikhaylenko <exalm7659 gmail com>
Date:   Thu Jun 28 13:13:35 2018 +0500

    flatpak: Switch to meson

 flatpak/org.gnome.Games.json | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/flatpak/org.gnome.Games.json b/flatpak/org.gnome.Games.json
index a4a0031..67212a1 100644
--- a/flatpak/org.gnome.Games.json
+++ b/flatpak/org.gnome.Games.json
@@ -201,6 +201,8 @@
         },
         {
             "name" : "gnome-games",
+            "buildsystem" : "meson",
+            "builddir" : true,
             "post-install" : [
                 "mkdir -p /app/lib/libretro/extra.d"
             ],