[vala] glib-2.0: Fix Filename.canonicalize() binding of g_canonicalize_filename

[Rico Tzschichholz <ricotz src gnome org>]

commit d01c12456ee934585a3443856023852ae84e6b44
Author: vanadiae <48521955+Vanadiae users noreply github com>
Date:   Fri Apr 10 17:44:42 2020 +0200

    glib-2.0: Fix Filename.canonicalize() binding of g_canonicalize_filename
    
    The required attibutes were not applied correctly when introduced by
    c124f827557420b620f7118cfbabb15d83b4a3e6

 vapi/glib-2.0.vapi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/vapi/glib-2.0.vapi b/vapi/glib-2.0.vapi
index 43aae4186..f323a2667 100644
--- a/vapi/glib-2.0.vapi
+++ b/vapi/glib-2.0.vapi
@@ -2807,7 +2807,8 @@ namespace GLib {
                public static string display_name (string filename);
                [Version (since = "2.6")]
                public static string display_basename (string filename);
-               [Version (cname = "g_canonicalize_filename", since = "2.58")]
+               [Version (since = "2.58")]
+               [CCode (cname = "g_canonicalize_filename")]
                public static string canonicalize (string filename, string? relative_to = null);
        }