[PATCH] [ARM] Add v8.1a architecture

[Renato Golin]

Hi James,

All of this will need some change when the target parser is in use, but that shouldn't stop you from adding this ARMv8 support in the driver. Feel free to commit this change, and I'll rebase when I do mine.

It would be helpful to add a "FIXME: Use ARMTargetParser" on everything that needs a proper lookup table, so that I can grep later and replace. But since those rules are delicate, and most of them use string comparisons, replacing them for proper lookup tables will take a lot of care and time, so it'll happen one at a time, in the near future.

Feel free to approve this one as you see fit, and we'll work around later.

cheers,
--renato


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http://reviews.llvm.org/D8799

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