fix(set_lsb_release): Make sure $ROOT/etc exists.
fix(set_lsb_release): Make sure $ROOT/etc exists.

Useful for generating a root filesystem overlay that catalyst can apply.

gtank/scripts,bcwaldon/coreos-scripts,smilart/scripts,mjg59/scripts,mischief/scripts,gtank/scripts,zhang0137/scripts,endocode/scripts,marineam/coreos-scripts,andrejro/coreos--scripts,crawford/scripts,marineam/coreos-scripts,sigma/coreos-scripts,fivethreeo/scripts,nicescale/scripts,endocode/scripts,glevand/coreos--scripts,nicescale/scripts,fivethreeo/scripts,crawford/scripts,marineam/coreos-scripts,zhang0137/scripts,vmware/coreos-scripts,vmware/coreos-scripts,fivethreeo/scripts,gtank/scripts,coreos/scripts,coreos/scripts,bcwaldon/coreos-scripts,vmware/coreos-scripts,bcwaldon/coreos-scripts,mischief/scripts,crawford/scripts,trnubo/scripts,endocode/scripts,zhang0137/scripts,mjg59/scripts,sigma/coreos-scripts,sigma/coreos-scripts,trnubo/scripts,andrejro/coreos--scripts,trnubo/scripts,smilart/scripts,smilart/scripts,BugRoger/scripts,mischief/scripts,BugRoger/scripts,glevand/coreos--scripts,mjg59/scripts,nicescale/scripts,andrejro/coreos--scripts,BugRoger/scripts