[gnome-sudoku] flatpak: use Meson for building

[Ernestas Kulik <ernestask src gnome org>]

commit 450376283c86035f7817c96900a50845307c6193
Author: Ernestas Kulik <ernestask gnome org>
Date:   Sat Dec 9 22:35:44 2017 +0200

    flatpak: use Meson for building
    
    https://bugzilla.gnome.org/show_bug.cgi?id=791212

 org.gnome.sudoku.json |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/org.gnome.sudoku.json b/org.gnome.sudoku.json
index 4e2bab5..20ef8ce 100644
--- a/org.gnome.sudoku.json
+++ b/org.gnome.sudoku.json
@@ -49,7 +49,9 @@
                     "type": "git",
                     "url": "https://git.gnome.org/browse/gnome-sudoku";
                 }
-            ]
+            ],
+            "buildsystem": "meson",
+            "builddir": true
         }
     ]
 }