[PATCH] Add Clang support for PPC cryptography builtins

[Nemanja Ivanovic]

Note to reviewers: There is currently no macro guard for the builtins that do not require Cagegory:Vector.Crypto. However, the back end will not generate code for them on older CPU's. Perhaps I should guard those with __POWER8_VECTOR__ macro. However, this would imply that -mcrypto needs to imply -mpower8-vector which is probably the correct thing to do since Category:Vector.Crypto is a subset of Category:Vector.
I can make these changes and upload a revision if everyone agrees with this approach.


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http://reviews.llvm.org/D7951

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