lstopo-cairo doesn't need #ifdef HWLOC_HAVE_CAIRO
lstopo-cairo doesn't need #ifdef HWLOC_HAVE_CAIRO

Makefile.am takes care of not building it

git-svn-id: 1cfb7a4bca8959128631a8f8b03d8f20c55fbb90@4522 4b44e086-7f34-40ce-a3bd-00e031736276

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