[gtk/gtk-4-6] Use the correct name for installed gdk tests

[Matthias Clasen <matthiasc src gnome org>]

commit 71c935d1f49be43e3d4eaeed0a4e3eb02470b13e
Author: Sebastien Bacher <seb128 ubuntu com>
Date:   Mon Mar 7 16:13:38 2022 +0100

    Use the correct name for installed gdk tests

 testsuite/gdk/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/testsuite/gdk/meson.build b/testsuite/gdk/meson.build
index 04c780f3f0..3de704fc64 100644
--- a/testsuite/gdk/meson.build
+++ b/testsuite/gdk/meson.build
@@ -85,7 +85,7 @@ if get_option('install-tests')
     test_cdata.set('testexecdir', testexecdir)
     test_cdata.set('test', test_name)
     configure_file(input: 'gdk.test.in',
-      output: '@0@.test'.format(t),
+      output: '@0@.test'.format(test_name),
       configuration: test_cdata,
       install: true,
       install_dir: testdatadir,