Add --thread option to make-no-jit script

On OS X 10.9.5

 When I checkout master and execute `./make-no-jit` I get the following failed assertion:

```
[translation:ERROR] AssertionError
[translation] start debugger...
> /Users/frank/Projects/externals/pypy/rpython/memory/gctransform/framework.py(1077)gct_gc_thread_run()
-> assert self.translator.config.translation.thread
```

It seems like the translator thread config option is not enabled by default. I've included the tread option
in `./make-no-jit`.