hwloc: bring back the configure error when external hwloc is >= 2.0#4934

bwbarrett merged 1 commit intoopen-mpi:v3.1.xopen-mpi/ompi:v3.1.xfrom

bgoglin:3.1.x-error-hwloc2bgoglin/ompi:3.1.x-error-hwloc2Copy head branch name to clipboard