[gnome-builder/tintou/glade-meson] glade: use meson build system in flatpak

[Corentin Noël <corentinnoel src gnome org>]

commit 5dc18ea972334d9440d20483f8243c1bd36f4f5d
Author: Corentin Noël <corentin noel collabora com>
Date:   Mon May 6 11:27:48 2019 +0200

    glade: use meson build system in flatpak

 build-aux/flatpak/org.gnome.Builder.json | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/build-aux/flatpak/org.gnome.Builder.json b/build-aux/flatpak/org.gnome.Builder.json
index c54375e5d..a5cf952b0 100644
--- a/build-aux/flatpak/org.gnome.Builder.json
+++ b/build-aux/flatpak/org.gnome.Builder.json
@@ -529,6 +529,12 @@
                 "/share/metainfo",
                 "/bin/glade"
             ],
+            "config-opts" : [
+                "--libdir=/app/lib",
+                "--buildtype=debugoptimized"
+            ],
+            "buildsystem" : "meson",
+            "builddir" : true,
             "sources" : [
                 {
                     "type" : "git",