[gnome-builder] vala: make IdeTask usable in the binding

[Corentin Noël <corentinnoel src gnome org>]

commit 558188d6313b7b963e438350f57940faaee373ca
Author: Corentin Noël <corentin noel collabora com>
Date:   Fri Jul 20 10:16:47 2018 +0100

    vala: make IdeTask usable in the binding

 src/libide/Ide-1.0.metadata | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/libide/Ide-1.0.metadata b/src/libide/Ide-1.0.metadata
index 34f95b4c0..f056f125d 100644
--- a/src/libide/Ide-1.0.metadata
+++ b/src/libide/Ide-1.0.metadata
@@ -1 +1,2 @@
 *.ref unowned
+Task.new.callback type="GLib.TaskReadyCallback" scope="async"