stage1: mount kubernetesLogDir for src and host flavors too
stage1: mount kubernetesLogDir for src and host flavors too

So the annotation coreos.com/rkt/experiment/kubernetes-log-dir works
with the source and host flavors.

lucasallan/rkt,joshix/rkt,rkt/rkt,joshix/rkt,rkt/rkt,alban/rkt,rkt/rkt,lucasallan/rkt,lucasallan/rkt,joshix/rkt,alban/rkt,lucasallan/rkt,kinvolk/rkt,alban/rkt,coreos/rkt,kinvolk/rkt,kinvolk/rkt,coreos/rkt,coreos/rkt,joshix/rkt,rkt/rkt,kinvolk/rkt