[pitivi] flatpak: Force using orc in -base

[Alexandru Băluț <alexbalut src gnome org>]

commit 6b78b26d443c460f58e02565c04f0808b274a498
Author: Thibault Saunier <tsaunier igalia com>
Date:   Mon Nov 19 15:49:59 2018 -0300

    flatpak: Force using orc in -base

 build/flatpak/org.pitivi.Pitivi.json | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/build/flatpak/org.pitivi.Pitivi.json b/build/flatpak/org.pitivi.Pitivi.json
index 6c403c5e..cc38db4b 100644
--- a/build/flatpak/org.pitivi.Pitivi.json
+++ b/build/flatpak/org.pitivi.Pitivi.json
@@ -429,6 +429,7 @@
             "buildsystem": "meson",
             "config-opts": [
                 "-Dgtkdoc=false",
+                "-Dorc=enabled",
                 "--libdir=lib"
             ],
             "builddir": true,