[gnome-continuous] manifest: Prefer python3 for building caribou

[Daiki Ueno <dueno src gnome org>]

commit c01182fc7576b36977d7f85224824f3b56621514
Author: Daiki Ueno <dueno src gnome org>
Date:   Mon Feb 20 11:19:04 2017 +0100

    manifest: Prefer python3 for building caribou

 manifest.json |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/manifest.json b/manifest.json
index c7c67e9..82aae57 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1107,7 +1107,8 @@
                 "name": "pygobject-python2",
                 "config-opts": ["--with-python=python2"]},
 
-               {"src": "gnome:caribou"},
+               {"src": "gnome:caribou",
+                "config-opts": ["PYTHON=python3"]},
 
                {"src": "gnome:gnome-shell",
                  "irc_room": "gnome-shell",