since starbench is now an installable package, there is no starbench.py script anymore; starbench is no longer a simple python script; the existing code that assumed starbench was a simple python needed to be adapted.
work related to [https://bugzilla.ipr.univ-rennes.fr/show_bug.cgi?id=3372]
- choosing different rsults dir allows to run the same benchmark more than once to have more than one measure
- this makes `hibenchonphysix.py` more decoupled from hibench, in the hope that it will be completely unaware of hibench at some poing (therefore reusable with other benchmarks)
- added the ability to show the performance per clock cycle (eg to see if avx512 has an effect on the computation)
- the cpus are now sorted on x axis depending on their generation
work related to [https://bugzilla.ipr.univ-rennes.fr/show_bug.cgi?id=3372]
Guillaume Raffy