Only add OpenMP libraries to `build`
Only add OpenMP libraries to `build`

As the libraries use `run_exports/strong`, there should be no need to
add them to `host` and `run` as long as they are in `build`.

conda-forge/conda-forge.github.io,conda-forge/conda-forge.github.io,conda-forge/conda-forge.github.io,conda-forge/conda-forge.github.io