Problem: rpl_variables_stm.test used a character set and a collation which
are not included on all platforms.
Fix: replace the character set and collation by ones that are included on
all platforms. (rpl_variables_stm does not rely on which character set is
used, the only important aspect is the fact that it changes.)


mysql-test/suite/rpl/r/rpl_variables_stm.result:
  Updated result file.
mysql-test/suite/rpl/t/rpl_variables_stm.test:
  Changed test to get rid of pushbuild errors.