Use cranelift as the backend of wasmer instead of single-pass

Author: kateinoigakukun

Diff for: test/lit.cfg

@@ -1376,7 +1376,7 @@ elif run_os == 'wasi':
            config.swift_test_options, config.swift_frontend_test_options)
     subst_target_swift_frontend_mock_sdk = config.target_swift_frontend
     subst_target_swift_frontend_mock_sdk_after = ""
-    config.target_run = 'wasmer run --'
+    config.target_run = 'wasmer run --backend cranelift --'
     if 'interpret' in lit_config.params:
         use_interpreter_for_simple_runs()
     config.target_sil_opt = (