Stub the implementation for all phases

rakelib/tester.rake

@@ -46,7 +46,8 @@ namespace :test do
   file init => [root_directory] do |task|
     cp (TMP + 'tools/init'), task.name
   end
-  test_files << init << executable_directory << expectation_directory
+  # Directories should come first.
+  test_files.unshift executable_directory, expectation_directory, init
 
   file (TMP + 'riscv/root.cpio') => test_files do |task|
     root_files = task.prerequisites