wcslib package: add version 6.4 (#12810)
wcslib package: add version 6.4 (#12810)


LLNL/spack,iulian787/spack,iulian787/spack,iulian787/spack,iulian787/spack,iulian787/spack,LLNL/spack,LLNL/spack,LLNL/spack,LLNL/spack