Log Message:
Update to version 2.0.17.  Convert to using buildlink.

Summary of changes for version 2.0.17:
-------------------------------------

  This will probably be the last release in the 2.0.x series.  There
  are a few bug fixes, but the major change is to print a message
  saying that Octave 2.0.x cannot be compiled with gcc 3.0.x or gcc
  2.96.  If you want to build Octave 2.0.x, you will need to use gcc
  2.95.x.  If you want to use gcc 3.0.x or some later version, you
  should be using the Octave 2.1.35 sources or a more recent version.