Adopt node properly

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Implemented split in the RootNodes to do proper contextualization of inlined methods

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Added DBG flag to graal.sh to be able to enable debugging with Eclipse easily

Signed-off-by: Stefan Marr <git@stefan-marr.de>