JNI bindings: move class list to a single place in makefile, touch headers.
JNI bindings: move class list to a single place in makefile, touch headers.

Using touch avoids re-running javah on every build, since it seems to
not update the file timestamps if they already exist.

davidhernon/libmapper,malloch/libmapper,libmapper/libmapper,davidhernon/libmapper,libmapper/libmapper,johnty/libmapper,johnty/libmapper,malloch/libmapper,malloch/libmapper,radarsat1/libmapper,malloch/libmapper,johnty/libmapper,malloch/libmapper,davidhernon/libmapper-admin2,radarsat1/libmapper,radarsat1/libmapper,libmapper/libmapper,davidhernon/libmapper,johnty/libmapper,libmapper/libmapper,davidhernon/libmapper-admin2,davidhernon/libmapper-admin2,radarsat1/libmapper,davidhernon/libmapper-admin2,libmapper/libmapper,libmapper/libmapper,malloch/libmapper,johnty/libmapper,davidhernon/libmapper-admin2,davidhernon/libmapper,davidhernon/libmapper,radarsat1/libmapper