llvm dev - Apr 2018 - __ARM_FEATURE_DOTPROD for AArch32

Hi Junmo,

I notice that you recently added the __ARM_FEATURE_DOTPROD pre-defined macro for
AArch64. Do you plan on also doing the AArch32 part of this? If not, I'm
currently working on adding the corresponding intrinsics to LLVM and clang, so
I'll add the macro as part of that.

Oliver