mc: create new package (#7564)
mc: create new package (#7564)

* mc: new package

* Update package.py

* Update package.py

* Update package.py

matthiasdiener/spack,tmerrick1/spack,matthiasdiener/spack,mfherbst/spack,iulian787/spack,mfherbst/spack,LLNL/spack,krafczyk/spack,EmreAtes/spack,krafczyk/spack,tmerrick1/spack,tmerrick1/spack,LLNL/spack,LLNL/spack,krafczyk/spack,tmerrick1/spack,iulian787/spack,EmreAtes/spack,matthiasdiener/spack,mfherbst/spack,iulian787/spack,iulian787/spack,tmerrick1/spack,EmreAtes/spack,EmreAtes/spack,matthiasdiener/spack,EmreAtes/spack,mfherbst/spack,matthiasdiener/spack,iulian787/spack,krafczyk/spack,krafczyk/spack,mfherbst/spack,LLNL/spack,LLNL/spack