mysql-test/r/archive.result:
  Update for test case to make sure that TRUNCATE and DELETE function(hah!) as designed.
mysql-test/t/archive.test:
  Add TRUNCATE and DELETE support.
sql/examples/ha_archive.cc:
  Added delete_all_rows() support.
sql/examples/ha_archive.h:
  Added delete_all_rows() support.
sql/handler.h:
  Added flags for fast delete support for archive and federated.