fix issue with lib directory causing ant clean and ant super-clean to fail
fix issue with lib directory causing ant clean and ant super-clean to fail

git-svn-id: 8abe1d02b055b1c3ad2747e884e38fb9e7cebddd@1422401 13f79535-47bb-0310-9956-ffa450edef68

danteinforno/flex-sdk,apache/flex-sdk,adufilie/flex-sdk,apache/flex-sdk,adufilie/flex-sdk,SlavaRa/flex-sdk,SlavaRa/flex-sdk,adufilie/flex-sdk,shyamalschandra/flex-sdk,shyamalschandra/flex-sdk,shyamalschandra/flex-sdk,shyamalschandra/flex-sdk,SlavaRa/flex-sdk,apache/flex-sdk,shyamalschandra/flex-sdk,adufilie/flex-sdk,danteinforno/flex-sdk,shyamalschandra/flex-sdk,adufilie/flex-sdk,adufilie/flex-sdk,SlavaRa/flex-sdk,danteinforno/flex-sdk,apache/flex-sdk,apache/flex-sdk,danteinforno/flex-sdk,SlavaRa/flex-sdk,danteinforno/flex-sdk,danteinforno/flex-sdk,apache/flex-sdk,SlavaRa/flex-sdk