Move generated files to gen/.

test/codegen/expect/8invalid-chars.in+file_name.js

Index: test/codegen/expect/8invalid-chars.in+file_name.js
diff --git a/test/codegen/expect/8invalid-chars.in+file_name.js b/test/codegen/expect/8invalid-chars.in+file_name.js
deleted file mode 100644
index e3290326b3e4e40bd365d5027a3e37209a650570..0000000000000000000000000000000000000000
--- a/test/codegen/expect/8invalid-chars.in+file_name.js
+++ /dev/null
@@ -1,14 +0,0 @@
-dart_library.library('8invalid-chars.in+file_name', null, /* Imports */[
-  'dart_sdk'
-], function(exports, dart_sdk) {
-  'use strict';
-  const core = dart_sdk.core;
-  const dart = dart_sdk.dart;
-  const dartx = dart_sdk.dartx;
-  const $8invalid$45chars$46in$43file_name = Object.create(null);
-  $8invalid$45chars$46in$43file_name.main = function() {
-  };
-  dart.fn($8invalid$45chars$46in$43file_name.main);
-  // Exports:
-  exports.$8invalid$45chars$46in$43file_name = $8invalid$45chars$46in$43file_name;
-});