[gnome-builder/gnome-builder-3-24] flatpak: bump ostree for flatpak dependency

[Christian Hergert <chergert src gnome org>]

commit b69677131ec9a1fff7bfcfa480e11843cf0d2765
Author: Christian Hergert <chergert redhat com>
Date:   Sat Jun 24 23:34:20 2017 -0700

    flatpak: bump ostree for flatpak dependency

 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 6f112ba..52e98aa 100644
--- a/org.gnome.Builder.json
+++ b/org.gnome.Builder.json
@@ -99,7 +99,7 @@
                 {
                     "type": "git",
                     "url": "https://github.com/ostreedev/ostree.git";,
-                    "branch": "v2017.3"
+                    "branch": "v2017.7"
                 }
             ]
         },