specs: save/restore concrete & patches when exporting/importing Specs
specs: save/restore concrete & patches when exporting/importing Specs

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