The HIP_PATH env var has been broken by an earlier patch to change the
linking to the HIP runtime with --hip-link in hipcc. We need to detect
when the HIP_PATH env var is defined, we have to pass that to the clang.
Change-Id: Iea939893844cce426d4bc4ace3539fc241363ff3
ROCm CI Service Account
3fb0920a55