compile errors around JMemoryBuddy

[Jeanette Winzenburg]

just fetched the latest upstream master and getting compile errors  
around xx.management packages (eclipse wants to add requires into the  
module-info - which certainly is the wrong way to go ;) Compiling  
against jdk12, if that matters (will update one of these days but  
shouldn't jdk11 be good enough).

Any quick ideas on what might be wrong?

-- Jeanette