Revert "Move DataTypes.h from Support to llvm-c to fix layering."

This reverts r328065.

I missed this one in r328085 and the bots were still failing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328095 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed