[gnome-contacts] Flatpak: update the manifest file to use meson

[Niels De Graef <nielsdg src gnome org>]

commit e665b7a27a83f8427415bea899b00db9c8814e5b
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Wed Sep 13 17:34:37 2017 +0200

    Flatpak: update the manifest file to use meson

 data/flatpak/org.gnome.Contacts.json |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/flatpak/org.gnome.Contacts.json b/data/flatpak/org.gnome.Contacts.json
index fd56e88..55c9058 100644
--- a/data/flatpak/org.gnome.Contacts.json
+++ b/data/flatpak/org.gnome.Contacts.json
@@ -230,6 +230,7 @@
         },
         {
             "name": "gnome-contacts",
+            "buildsystem": "meson",
             "sources": [
                 {
                     "type": "git",