rakefile: do not die during token check in case of malformed rhobuild/build.yml
rakefile: do not die during token check in case of malformed rhobuild/build.yml

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