Meta-hob layer is not needed. The stuff from that directory should be placed in other directory, like build/. I've filled this bug, to remember it for 1.6.
I sent a patch set for this enh, because I need this to be done in order to implement the solution for #5002. Also, we need to remove this layer, because it is not necessary. Cristiana
patches merged to master http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=2557667aa0961c360ec31079ab3e4860458f842c