build_packages: Update help for CoreOS
build_packages: Update help for CoreOS

Signed-off-by: Geoff Levand <c3918f39022407dee6a0056ceca9b1aa80e8e4ce@infradead.org>

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