[gnome-continuous] manifest: add gthumb

[Vadim Rutkovsky <vrutkovsky src gnome org>]

commit 8c38bc787112438b4e2e471e09b5ba6578ccef96
Author: Vadim Rutkovsky <vrutkovs redhat com>
Date:   Mon Mar 16 17:55:52 2015 +0100

    manifest: add gthumb

 manifest.json |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/manifest.json b/manifest.json
index fa1e882..b8c9661 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1285,7 +1285,9 @@
 
                {"src": "gnome:gnome-multi-writer"},
 
-               {"src": "gnome:gnome-music"}
+               {"src": "gnome:gnome-music"},
+
+               {"src": "gnome:gthumb"}
 
        ],