commit 26002 breaks compile on m68k nommu.

[Lennart Sorensen]

Commit 26002 attemps to implement the deamon() call on nommu systems.
It unfortunately did so using INTENAL_SYSCALL which doesn't exist on m68k,
and hence compiles of m68k nommu now fail.

I suspect it should be using something similar to _exit.c to access
the clone and exit syscalls, or one of the _syscall# functions, but I
can't quite make sense of what INTERNAL_SYSCALL actually does on other
architectures enough to actually fix it.

Maybe someone with a clue about syscalls can propose a simple fix
for this.

-- 
Len Sorensen