Pull Request: Intial support for R600 Target

Hi,

I think my original patch got stuck in moderation, but I have made some
changes since then and created my own libclc repo here:
git://people.freedesktop.org/~tstellar/libclc master

I would like to get these changes included in the main libclc repo.
Would you be able to review these changes and merge them into the main
repo if they are acceptable?

Thanks,
Tom Stellard

I apologise for the delay in reviewing your patches, as I have been
busy this week. I will certainly try to take a look at your changes
over the weekend.

Thanks,