scotch: update to 6.0.10 (released 31-AUG-2020) (#18462)
scotch: update to 6.0.10 (released 31-AUG-2020) (#18462)

- added gitlab location, updated the homepage location

Co-authored-by: Mark Olesen <389690c0b0826b585112bfedf38b1a20410c67a9@esi-group.com>
LLNL/spack,LLNL/spack,iulian787/spack,LLNL/spack,iulian787/spack,iulian787/spack,iulian787/spack,LLNL/spack,LLNL/spack,iulian787/spack