[gnome-builder] build: disable vala-pack plugin until upstream fixes vala

[Christian Hergert <chergert src gnome org>]

commit ecf28837d869310aef2724255f32c9be902a18c2
Author: Christian Hergert <chergert redhat com>
Date:   Fri Mar 10 18:04:28 2017 -0800

    build: disable vala-pack plugin until upstream fixes vala
    
    We want to keep Nightly builds working, even if that means vala is
    disabled. Vala plugin is broken due to bug 779038.

 org.gnome.Builder.json |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/org.gnome.Builder.json b/org.gnome.Builder.json
index 6eea8b6..fd3564a 100644
--- a/org.gnome.Builder.json
+++ b/org.gnome.Builder.json
@@ -309,7 +309,7 @@
         },
         {
             "name": "gnome-builder",
-            "config-opts": [ "--enable-tracing", "--enable-debug", "--with-channel=flatpak-nightly" ],
+            "config-opts": [ "--enable-tracing", "--enable-debug", "--with-channel=flatpak-nightly", 
"--disable-vala-pack-plugin" ],
             "sources": [
                 {
                     "type": "git",