[evince] flatpak: Set meson as default build system

[Germán Poo-Caamaño <gpoo src gnome org>]

commit 469192c31c67008896513247f8064d331dd7b388
Author: Germán Poo-Caamaño <gpoo gnome org>
Date:   Wed Oct 10 15:44:45 2018 -0300

    flatpak: Set meson as default build system
    
    Match the build system used in CI for flatpak.

 build-aux/flatpak/org.gnome.Evince.json | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/build-aux/flatpak/org.gnome.Evince.json b/build-aux/flatpak/org.gnome.Evince.json
index f4d7f0c7..642cafd5 100644
--- a/build-aux/flatpak/org.gnome.Evince.json
+++ b/build-aux/flatpak/org.gnome.Evince.json
@@ -167,8 +167,9 @@
         },
         {
             "name" : "evince",
+            "buildsystem" : "meson",
             "config-opts" : [
-                "--disable-nautilus"
+                "-Dnautilus=false"
             ],
             "sources" : [
                 {