hwloc v1.5 does not support HWLOC_OBJ_OSDEV_COPROC
nor hwloc_topology_dup(), so for this version :
- do not search for coprocessors
- do not try hwloc_topology_dup(), note this is not
used anywhere in the code base
Thanks Jeff for helping with the wording
Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>