Now the DROP privilege is also required on a table in order to be able
to drop a partition from the table using ALTER TABLE.


sql/sql_parse.cc:
  Require DROP privilege in addition to ALTER for dropping a partition
mysql-test/r/partition_grant.result:
  New BitKeeper file ``mysql-test/r/partition_grant.result''
mysql-test/t/partition_grant.test:
  New BitKeeper file ``mysql-test/t/partition_grant.test''