8261845: File permissions of packages built by jpackage

Reviewed-by: asemenyuk, herrick

src/jdk.jpackage/windows/classes/jdk/jpackage/internal/WinExeBundler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -141,6 +141,8 @@ private Path buildEXE(Map<String, ? super Object> params, Path msi,
 
         Files.copy(exePath, dstExePath);
 
+        dstExePath.toFile().setWritable(true, true);
+
         Log.verbose(MessageFormat.format(
                 I18N.getString("message.output-location"),
                 outdir.toAbsolutePath().toString()));