[Ironruby-core] Checked in a Rakefile that should work correctly with Linux filesystem

[John Lam (DLR)]

Sanghyeon Seo:

> :compile task depends on :happy task, which cannot find .exe commands.

Excellent! I just applied this patch to my local copy. I'll push it out tomorrow along with some other fixes that I'm working on tonight.

Other than that, does it compile and run OK on Mono?

Thanks,
-John