refactor: move secondary entry point rollup configs.

packages/upgrade/static/rollup.config.js

@@ -0,0 +1,15 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+export default {
+  entry: '../../../dist/packages-dist/upgrade/static.js',
+  dest: '../../../dist/packages-dist/upgrade/bundles/upgrade-static.umd.js',
+  format: 'umd',
+  moduleName: 'ng.upgrade.static',
+  globals: {'@angular/core': 'ng.core'}
+};