spades: fix build (#7608)
spades: fix build (#7608)

Version 3.11 works with gcc7
see: https://github.com/ablab/spades/issues/26
EmreAtes/spack,iulian787/spack,tmerrick1/spack,krafczyk/spack,LLNL/spack,tmerrick1/spack,iulian787/spack,LLNL/spack,mfherbst/spack,iulian787/spack,LLNL/spack,LLNL/spack,tmerrick1/spack,mfherbst/spack,tmerrick1/spack,EmreAtes/spack,mfherbst/spack,matthiasdiener/spack,mfherbst/spack,EmreAtes/spack,krafczyk/spack,krafczyk/spack,iulian787/spack,matthiasdiener/spack,tmerrick1/spack,EmreAtes/spack,krafczyk/spack,EmreAtes/spack,matthiasdiener/spack,mfherbst/spack,matthiasdiener/spack,krafczyk/spack,matthiasdiener/spack,LLNL/spack,iulian787/spack