[PATCH] Add remote testing support to the lit config.

[Dan Albert]

Here's my take on `remote.py`: https://gist.github.com/DanAlbert/a45ac580c3fc61917856

This patch no longer applies cleanly to ToT, and I don't know what revision it was generate against, so I wasn't able to apply this to my working tree to test it. Once it's rebased I'll verify.


http://reviews.llvm.org/D7380

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