We should improve the handling of our java build tools. Currently, the source code is divided between three places make/src, make/jdk/src and make/hotspot/src. All tools should move to make/src.

Secondly, the tools are built at three distinct places, for jdk and hotspot as a buildtools step, and for make/src currently in JFR gensrc (since there is only a single tool). We should probably move to a model where each individual tool is compiled where and when it is needed. This might be accomplished by adding an INCLUDE functionality to SetupJavaCompilation.