Interpreter+AWT needs bigger stack

[Pavel Roskin]

Hello!

I've noticed that Kaffe compiled with interpreter and unix-jthreads
cannot run any AWT program, including WidgetDemo
However, if I increase the stack size to 64k using "-ss 64k" switch, it
works not worse than JIT version.

I don't know whether such enormous stack consumption is the correct
behaviour. Anyway, either this should be corrected, or the default stack
size increased.

Pavel Roskin