Add option -fgpu-sanitize to enable sanitizer for AMDGPU target. Since it is experimental, it is off by default. Reviewed by: Artem Belevich Differential Revision: https://reviews.llvm.org/D96835
This directory is for testing invalid ROCm installations. It is invalid for -fgpu-sanitize since the required Asan runtime library (asanrtl.bc) is missing.