Sink some IntrinsicInst.h and Intrinsics.h out of llvm/include

Many of these uses can get by with forward declarations. Hopefully this
speeds up compilation after adding a single intrinsic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312759 91177308-0d34-0410-b5e6-96231b3b80d8
11 files changed