likwid: add todo (#2531)
likwid: add todo (#2531)

* likwid: add todo

* liwkid: add a note on hwloc dependency

LLNL/spack,tmerrick1/spack,iulian787/spack,matthiasdiener/spack,iulian787/spack,tmerrick1/spack,lgarren/spack,iulian787/spack,tmerrick1/spack,matthiasdiener/spack,lgarren/spack,mfherbst/spack,mfherbst/spack,krafczyk/spack,tmerrick1/spack,TheTimmy/spack,iulian787/spack,krafczyk/spack,skosukhin/spack,krafczyk/spack,mfherbst/spack,EmreAtes/spack,skosukhin/spack,matthiasdiener/spack,tmerrick1/spack,skosukhin/spack,iulian787/spack,EmreAtes/spack,TheTimmy/spack,TheTimmy/spack,EmreAtes/spack,lgarren/spack,LLNL/spack,lgarren/spack,krafczyk/spack,matthiasdiener/spack,LLNL/spack,EmreAtes/spack,EmreAtes/spack,matthiasdiener/spack,LLNL/spack,TheTimmy/spack,krafczyk/spack,mfherbst/spack,skosukhin/spack,lgarren/spack,TheTimmy/spack,mfherbst/spack,LLNL/spack,skosukhin/spack