fix(make_chroot): Fix support for new users with existing groups.
fix(make_chroot): Fix support for new users with existing groups.

When a user creates a chroot and as a common primary group such as
'users' the groupadd command fails. Instead treat this the same as users
and only fail if the group exists but has a different (such as the
'users' group not using GID 100). Hopefully this works better.

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