Only add python flag for newer versions of glib (#7579)
Only add python flag for newer versions of glib (#7579)


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