Hexagon buildbots enabled on lab.llvm.org

Hi llvmdev,

I wanted to announce that we have added a pair of Hexagon buildbots to lab.llvm.org. We had been working on ensuring all the tests pass and getting the buildbot infrastructure ready. The buildbots were enabled yesterday afternoon.

The buildbots are:

Thanks Rick, Jyotsna, and Galina for helping set the buildbotsup!

Please feel free to email Rick or me if you have any questions on the Hexagon buildbots.