gio/tests: Add test generated txt as the resources test dependency

This is required by the resources used in some tests, however we did not
depend on it so we had some random build failures:
  https://gitlab.gnome.org/3v1n0/glib/-/jobs/3253787

gio/tests/meson.build

@@ -982,7 +982,7 @@ if not meson.is_cross_build()
   gio_tests += {
     'resources' : {
       'extra_sources' : resources_extra_sources,
-      'depends' : resource_plugin,
+      'depends' : [resource_plugin, test_generated_txt],
     },
   }
 endif