[PATCH] Add AnyReg calling convention support for patchpoint intrinsic.

[Juergen Ributzka]

  I agree that there is a lot of code duplication in InstrEmitter::EmitMachineNode, but that is not only because of the VREG. The argument handling is also a little bit different, because we have an optional defined return. I will take another look and try to refactor the code.

http://llvm-reviews.chandlerc.com/D2009