Add some options to spec command.
Add some options to spec command.

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