[gnome-builder/wip/albfan/libgit2-glib-python3] Use python3 on libgit2-glib

[Alberto Fanjul <albfan src gnome org>]

commit 1112437b6ef9ede7fa78e16e45e9cb950db04ed9
Author: Alberto Fanjul <albertofanjul gmail com>
Date:   Fri Jun 28 18:28:17 2019 +0200

    Use python3 on libgit2-glib

 build-aux/flatpak/org.gnome.Builder.json | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/build-aux/flatpak/org.gnome.Builder.json b/build-aux/flatpak/org.gnome.Builder.json
index 9ff59f6da..b902ef4f3 100644
--- a/build-aux/flatpak/org.gnome.Builder.json
+++ b/build-aux/flatpak/org.gnome.Builder.json
@@ -233,7 +233,8 @@
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://gitlab.gnome.org/GNOME/libgit2-glib.git";
+                    "url" : "https://gitlab.gnome.org/GNOME/libgit2-glib.git";,
+                    "branch": "wip/albfan/python3"
                 }
             ]
         },