[epiphany/gnome-3-26] flatpak: use meson

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 1c5bb541265d736ce18ad7dd8566c05ee87a6e08
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Tue Oct 3 09:55:37 2017 +0200

    flatpak: use meson

 org.gnome.Epiphany.json |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/org.gnome.Epiphany.json b/org.gnome.Epiphany.json
index 9835434..07fd499 100644
--- a/org.gnome.Epiphany.json
+++ b/org.gnome.Epiphany.json
@@ -49,6 +49,8 @@
         },
         {
             "name": "epiphany",
+            "buildsystem": "meson",
+            "builddir": true,
             "sources": [
                 {
                     "type": "archive",