rakefile: add only one error message at a time for minification errors, also include output
rakefile: add only one error message at a time for minification errors, also include output

louisatome/rhodes,rhosilver/rhodes-1,louisatome/rhodes,louisatome/rhodes,louisatome/rhodes,louisatome/rhodes,louisatome/rhodes,UIKit0/rhodes,rhosilver/rhodes-1,rhosilver/rhodes-1,louisatome/rhodes,rhosilver/rhodes-1,rhosilver/rhodes-1,rhosilver/rhodes-1,rhosilver/rhodes-1,UIKit0/rhodes,UIKit0/rhodes,UIKit0/rhodes,UIKit0/rhodes,UIKit0/rhodes,UIKit0/rhodes,UIKit0/rhodes,rhosilver/rhodes-1,louisatome/rhodes,rhosilver/rhodes-1,louisatome/rhodes,UIKit0/rhodes,rhosilver/rhodes-1,UIKit0/rhodes