[PATCH] Move logic from llvm::Triple::getARMCPUForArch to driver::tools::arm::getARMCPUForMArch

[Derek Schuff]

I tried to also bring the couple of relevant unittests in llvm/unittests/ADT/unittests but there seems to be no sane way to create an Arg (for the ArgList) for testing (without going through the same steps ParseArgs does). I'm open to suggestions on that?


http://reviews.llvm.org/D8622

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