wgsim: Create new package. (#7674)
wgsim: Create new package. (#7674)

* wgsim: Create new package.

* fix flake8 error.

* wgsim: change cc compiler to spack_cc.

* add missing dependency.

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