[gnome-builder] fix repo url

[Christian Hergert <chergert src gnome org>]

commit f2d2378dc891dfb8c757459a88b46f2bb5ffac65
Author: Christian Hergert <chergert redhat com>
Date:   Thu Aug 9 09:41:19 2018 -0700

    fix repo url

 build-aux/flatpak/org.gnome.Builder.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/build-aux/flatpak/org.gnome.Builder.json b/build-aux/flatpak/org.gnome.Builder.json
index cd83294c5..198d219fc 100644
--- a/build-aux/flatpak/org.gnome.Builder.json
+++ b/build-aux/flatpak/org.gnome.Builder.json
@@ -847,7 +847,7 @@
                 {
                     "disable-shallow-clone" : true,
                     "type" : "git",
-                    "url" : "file:///home/christian/Projects/gnome-builder/.git"
+                    "url" : "https://gitlab.gnome.org/GNOME/gnome-builder.git";
                 }
             ]
         }