Add a little more documentation to the hwloc_ca...
Add a little more documentation to the hwloc_ca...

Add a little more documentation to the hwloc_cache_attr_s.depth field.

This commit was SVN r3793.

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