changed url for astyle (#6863)
changed url for astyle (#6863)

* changed url for astyle

* use SourceForge

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