protocol: sort protocols from wayland-protocols alphabetically

protocol/meson.build

@@ -21,9 +21,9 @@ wayland_scanner_client = generator(
 )
 
 protocols = [
-	[wl_protocol_dir, 'unstable/xdg-shell/xdg-shell-unstable-v6.xml'],
 	[wl_protocol_dir, 'stable/xdg-shell/xdg-shell.xml'],
 	[wl_protocol_dir, 'unstable/idle-inhibit/idle-inhibit-unstable-v1.xml'],
+	[wl_protocol_dir, 'unstable/xdg-shell/xdg-shell-unstable-v6.xml'],
 	'gamma-control.xml',
 	'gtk-primary-selection.xml',
 	'idle.xml',