Add latest version of GCC
Add latest version of GCC

mfherbst/spack,krafczyk/spack,mfherbst/spack,lgarren/spack,matthiasdiener/spack,skosukhin/spack,lgarren/spack,matthiasdiener/spack,tmerrick1/spack,TheTimmy/spack,tmerrick1/spack,LLNL/spack,iulian787/spack,EmreAtes/spack,tmerrick1/spack,krafczyk/spack,iulian787/spack,lgarren/spack,TheTimmy/spack,tmerrick1/spack,EmreAtes/spack,TheTimmy/spack,LLNL/spack,matthiasdiener/spack,EmreAtes/spack,skosukhin/spack,krafczyk/spack,lgarren/spack,LLNL/spack,mfherbst/spack,skosukhin/spack,LLNL/spack,TheTimmy/spack,EmreAtes/spack,skosukhin/spack,matthiasdiener/spack,iulian787/spack,mfherbst/spack,krafczyk/spack,matthiasdiener/spack,iulian787/spack,lgarren/spack,skosukhin/spack,TheTimmy/spack,mfherbst/spack,krafczyk/spack,iulian787/spack,LLNL/spack,EmreAtes/spack,tmerrick1/spack