[quadrapassel] flatpak: update manifest to use meson

[Michael Catanzaro <mcatanzaro src gnome org>]

commit ff03772c48dc6089dc2b96ef83fbd59371e728ed
Author: Bilal Elmoussaoui <bil elmoussaoui gmail com>
Date:   Thu Dec 13 13:35:34 2018 +0100

    flatpak: update manifest to use meson

 flatpak/org.gnome.quadrapassel.json | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/flatpak/org.gnome.quadrapassel.json b/flatpak/org.gnome.quadrapassel.json
index 214d12c..5d1ea0d 100644
--- a/flatpak/org.gnome.quadrapassel.json
+++ b/flatpak/org.gnome.quadrapassel.json
@@ -46,6 +46,7 @@
     },
     {
       "name": "quadrapassel",
+      "buildsystem": "meson",
       "sources": [
         {
           "type": "git",