lstopo: Relax input/output format parsing
lstopo: Relax input/output format parsing

Not case-sensitive anymore, and some may be shorten.

git-svn-id: d7e4889375222e37e90f49aaf5158f318708af8e@2278 4b44e086-7f34-40ce-a3bd-00e031736276

BlueBrain/hwloc,BlueBrain/hwloc,BlueBrain/hwloc,BlueBrain/hwloc