Convert isl to AutotoolsPackage (#3507)
Convert isl to AutotoolsPackage (#3507)


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