mysql-test/mysql-test-run.sh:
  Make "mysql-test-run.sh" accept (and ignore) the options "--with-ndbcluster" 
  and "--with-ndbcluster-only".
  This is necessary because newer build tools will issue them, and the test 
  script should tolerate that.
  Backport from 5.1 (Tomas Ulin, 2006-01-17)