Fix build against LLVM SVN >= r216393

Tested-by: Aaron Watry <awatry@gmail.com>

git-svn-id: https://llvm.org/svn/llvm-project/libclc/trunk@216653 91177308-0d34-0410-b5e6-96231b3b80d8
Fix build against LLVM SVN >= r216488

Tested-by: Aaron Watry <awatry@gmail.com>

git-svn-id: https://llvm.org/svn/llvm-project/libclc/trunk@216654 91177308-0d34-0410-b5e6-96231b3b80d8