[gnome-clocks] [flatpak] Use Meson.

[Arnaud Bonatti <arnaudb src gnome org>]

commit a3f1391dbf99f2f4dd4577846ff33563a03f4162
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sun Mar 4 16:26:24 2018 +0100

    [flatpak] Use Meson.

 data/flatpak/org.gnome.clocks.json |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/flatpak/org.gnome.clocks.json b/data/flatpak/org.gnome.clocks.json
index f0aa577..13c5796 100644
--- a/data/flatpak/org.gnome.clocks.json
+++ b/data/flatpak/org.gnome.clocks.json
@@ -77,6 +77,7 @@
         },
         {
             "name": "gnome-clocks",
+            "buildsystem": "meson",
             "sources": [
                 {
                     "type": "git",