[gnome-builder] Builder: add channel option for flatpak build

[Christian Hergert <chergert src gnome org>]

commit 0f46f2bc3e644b04320be5c1a82ee19b98fb3a91
Author: Christian Hergert <chergert redhat com>
Date:   Mon Feb 27 16:15:42 2017 -0800

    Builder: add channel option for flatpak build
    
    This just denotes that we are doing a local developer build in Builder
    and not via some other distribution mechanism.

 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 6d7070a..211bb2c 100644
--- a/org.gnome.Builder.json
+++ b/org.gnome.Builder.json
@@ -307,7 +307,7 @@
         },
         {
             "name": "gnome-builder",
-            "config-opts": [ "--enable-tracing", "--enable-debug" ],
+            "config-opts": [ "--enable-tracing", "--enable-debug", "--with-channel=flatpak-devel" ],
             "sources": [
                 {
                     "type": "git",