doc: hagrid only has 4 sockets in the doc example now
doc: hagrid only has 4 sockets in the doc example now

git-svn-id: 14be032f8f42541b1a281b51ae8ea69814daf20e@1008 4b44e086-7f34-40ce-a3bd-00e031736276

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