clp: add build_directory, remove old hack (#10112)
clp: add build_directory, remove old hack (#10112)

* clp: add build_directory, remove old hack

* clp: use spack-build for building

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