Fixed by making CREATE/ALTER/DROP PROCEDURE cause implicit commit.


mysql-test/r/rpl_ddl.result:
  Updated results to include testing of implicit commit for
  create/alter/drop procedure
mysql-test/t/rpl_ddl.test:
  BUG#12870 test implicit commit for create/alter/drop procedure.
sql/sql_parse.cc:
  CREATE/ALTER/DROP PROCEDURE/SPFUNCTION now causes implicit commit.