Fix lib/include paths with oneapi

[wspear]

Is there a better way to handle this? Do we need to check for lib vs lib64?

[eugeneswalker]

@rscohn2 is this safe for oneapi generally? any thought?

[rscohn2]

@rscohn2 is this safe for oneapi generally? any thought?

It looks good. I would have done it this way:

prefix = spec["mpi"].package.component_prefix if spec["mpi"].name == "intel-oneapi-mpi" else spec["mpi"].prefix
options.append(f"-mpiinc={prefix.include}")
options.append(f"-mpilib={prefix.lib}")

But what you have is fine. I checked 2021.4: and do not see a lib64 directory.