hwloc-distances: big fix of the usage
hwloc-distances: big fix of the usage

This commit was SVN r5214.

ggouaillardet/hwloc,shekkbuilder/hwloc,ggouaillardet/hwloc,shekkbuilder/hwloc,ggouaillardet/hwloc,shekkbuilder/hwloc,ggouaillardet/hwloc,shekkbuilder/hwloc