mpip: add demangling and setjmp variants (#15837)
mpip: add demangling and setjmp variants (#15837)

* Add demangling to mpip

* Add setjmp support to mpip

* Flake8 fixes
LLNL/spack,iulian787/spack,LLNL/spack,iulian787/spack,iulian787/spack,iulian787/spack,LLNL/spack,iulian787/spack,LLNL/spack,LLNL/spack