[vala/wip/tintou/gio-file-build-filename] gio-2.0: add missing File.new_build_filename

[Corentin Noël <corentinnoel src gnome org>]

commit dd8f00beb0244bf97800a509fa0ae6934a31132c
Author: Corentin Noël <corentin elementary io>
Date:   Tue Nov 13 06:57:36 2018 +0100

    gio-2.0: add missing File.new_build_filename

 vapi/gio-2.0.vapi | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/vapi/gio-2.0.vapi b/vapi/gio-2.0.vapi
index c4ebabab9..93763315f 100644
--- a/vapi/gio-2.0.vapi
+++ b/vapi/gio-2.0.vapi
@@ -3549,6 +3549,8 @@ namespace GLib {
                public static GLib.File new_for_uri (string uri);
                [Version (since = "2.32")]
                public static GLib.File new_tmp (string? tmpl, out GLib.FileIOStream iostream) throws 
GLib.Error;
+               [Version (since = "2.56")]
+               public static GLib.File new_build_filename (string arg, ...);
                [Version (since = "2.22")]
                public abstract GLib.FileIOStream open_readwrite (GLib.Cancellable? cancellable = null) 
throws GLib.Error;
                [Version (since = "2.22")]