Switch to hwloc 2.x.

* inria/storm.scm (starpu-1.1)[propagated-inputs]: Use HWLOC-1.
(starpu-1.3)[propagated-inputs]: Use HWLOC instead of HWLOC-1.
* inria/mpi.scm (openmpi-with-mpi1-compat)[inputs]: New field.
* inria/hiepacs.scm (pastix-5)[propagated-inputs]: Use HWLOC-1.
26 jobs for hwloc-2.x in 22 minutes and 51 seconds (queued for 2 seconds)