bdw-gc: add variant for Multithreading (#12223)
bdw-gc: add variant for Multithreading (#12223)


LLNL/spack,iulian787/spack,LLNL/spack,LLNL/spack,iulian787/spack,iulian787/spack,LLNL/spack,iulian787/spack,iulian787/spack,LLNL/spack