[vala/staging] vapi: Update GIR-based bindings

[Rico Tzschichholz <ricotz src gnome org>]

commit 28f7f86bd374adada03dc34788090ae71725e5a5
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Jan 8 16:44:15 2018 +0100

    vapi: Update GIR-based bindings

 vapi/gio-2.0.vapi |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/vapi/gio-2.0.vapi b/vapi/gio-2.0.vapi
index c532271..716fb7c 100644
--- a/vapi/gio-2.0.vapi
+++ b/vapi/gio-2.0.vapi
@@ -392,6 +392,12 @@ namespace GLib {
                public static void set_default (GLib.Application? application);
                public void set_flags (GLib.ApplicationFlags flags);
                public void set_inactivity_timeout (uint inactivity_timeout);
+               [Version (since = "2.56")]
+               public void set_option_context_description (string? description);
+               [Version (since = "2.56")]
+               public void set_option_context_parameter_string (string? parameter_string);
+               [Version (since = "2.56")]
+               public void set_option_context_summary (string? summary);
                [Version (since = "2.42")]
                public void set_resource_base_path (string? resource_path);
                [Version (since = "2.44")]