Update devel/apache-ant to 1.8.0

Fix PR pkg/42990

* Lexically scoped local properties, i.e. properties that are only defined
  inside a target, sequential block or similar environment.
* <import> can now import from any file- or URL-providing resource - this
  includes <javaresource>.
* Various improvements to the directory scanning code that help with symbolic
  link cycles (as can be found on MacOS X Java installations for example) and
  improve scanning performance. For big directory trees the improvement is
  dramatic.
* The way developers can extend Ant's property expansion algorithm has been
  rewritten (breaking the older API) to be easier to use and be more powerful.
  a new top level element extension-point allows build files to be extended
  with custom targets more easily
* At the same time the if and unless attributes have been rewritten to do the
  expected thing if applied to a property expansion (i.e. if="${foo}" will mean
  "yes, do it" if ${foo} expands to true, in Ant 1.7.1 it would mean "no"
  unless a property named "true" existed). This adds "testing conditions" as a
  new use-case to property expansion.
* Ant now requires Java 1.4 or later
* new task include provides an alternative to <import> that should be preferred
  when you don't want to override any targets
* numerous bug fixes and improvements as documented in Bugzilla and in WHATSNEW

(tonio)