[mutter] meson: Expand on xwayland_initfd option description

[Jonas Ådahl <jadahl src gnome org>]

commit 121c5d2a927f168f4df9b95230d261d299b46299
Author: Mart Raudsepp <leio gentoo org>
Date:   Tue Mar 3 17:40:11 2020 +0200

    meson: Expand on xwayland_initfd option description
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/1104

 meson_options.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson_options.txt b/meson_options.txt
index 097809a93..75a1961e4 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -156,5 +156,5 @@ option('xwayland_grab_default_access_rules',
 option('xwayland_initfd',
   type: 'feature',
   value: 'auto',
-  description: 'Whether Xwayland -initfd argument is used'
+  description: 'Whether -initfd argument is passed to Xwayland to guarantee services (e.g. gsd-xsettings) 
startup before applications'
 )