wip/jdk15 buildable on x86_64

[Francois Tigeot <ftigeot@xxxxxxxxxxxx>]

Hi all,

wip/jdk15 is now (sort of) buildable on DragonFly/x86_64 machines.

The build will stop after some time with some fontconfig issues but
if you just type bmake again, it should complete.

I did a quick test on an i386/2.6 host, and the bootstrap java compiler
crashed and burned almost instantly. YMMV.

-- 
Francois Tigeot