Through JDK-8261782, javac has added support for PrimitiveObject top type during compile time.

The specification is available here:
https://openjdk.java.net/jeps/8251554

This ticket is for VM/runtime to implicitly have primitive classes implement PrimitiveObject interface.

Please note: when such support is added, the langtools test:
test/langtools/tools/javac/valhalla/lworld-values/InstanceOfTopTypeTest.java

will start failing. Suitable amend the test.