contrib/jwrapper: Definition of a grammar to parse javap output

Signed-off-by: Frédéric Vachon <fredvac@gmail.com>
contrib/jwrapper: Added AST visitor for data extraction

Signed-off-by: Frédéric Vachon <fredvac@gmail.com>
contrib/jwrapper: Added code generation module with code conversion maps

Signed-off-by: Frédéric Vachon <fredvac@gmail.com>
contrib/jwrapper: Added UNDEFINED to javap_visitor.res in sav

Signed-off-by: Frédéric Vachon <fredvac@gmail.com>