re2c package: add version 1.2.1 (#12455)
re2c package: add version 1.2.1 (#12455)


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