AVX-512: Added FMA instructions, intrinsics an tests for KNL and SKX targets

by Asaf Badouh

http://reviews.llvm.org/D6456



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224764 91177308-0d34-0410-b5e6-96231b3b80d8