title: fileset doesn't support the "erroronmissingdir" attribute
body: <p>I am using ant 1.7, getting following error:</p>
  
  <p>build.xml:55: fileset doesn't support the "erroronmissingdir" attribute</p>
  
  <p>what is the alternative attribute for erroronmissingdir( it is in 1.8) in 1.7</p>