[pitivi] flatpak: Make sure to have an mp3 encoder

[Thibault Saunier <tsaunier src gnome org>]

commit 563fbaa5672183077358967ae6b854b261703343
Author: Thibault Saunier <tsaunier gnome org>
Date:   Thu Jun 30 13:48:30 2016 -0400

    flatpak: Make sure to have an mp3 encoder

 build/flatpak/pitivi.template.json |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/build/flatpak/pitivi.template.json b/build/flatpak/pitivi.template.json
index 76b2263..3a7b5de 100644
--- a/build/flatpak/pitivi.template.json
+++ b/build/flatpak/pitivi.template.json
@@ -204,6 +204,16 @@
             ]
         },
         {
+            "name": "lame",
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "http://downloads.sourceforge.net/lame/lame-3.99.5.tar.gz";,
+                    "sha256": "24346b4158e4af3bd9f2e194bb23eb473c75fb7377011523353196b19b9a23ff"
+                }
+            ]
+        },
+        {
 
             "name": "meson",
             "build-options" : {