Some optimization to reduce rules number in sql_yacc.yy


mysql-test/r/create.result:
  Now table and database inhirited a character set from a level above at CREATE time
mysql-test/r/fulltext.result:
  Now table and database inhirited a character set from a level above at CREATE time
mysql-test/r/innodb.result:
  Now table and database inhirited a character set from a level above at CREATE time
mysql-test/r/merge.result:
  Now table and database inhirited a character set from a level above at CREATE time
mysql-test/r/show_check.result:
  Now table and database inhirited a character set from a level above at CREATE time
mysql-test/r/symlink.result:
  Now table and database inhirited a character set from a level above at CREATE time
mysql-test/r/type_enum.result:
  Now table and database inhirited a character set from a level above at CREATE time
mysql-test/r/type_set.result:
  Now table and database inhirited a character set from a level above at CREATE time
sql/sql_yacc.yy:
  Now table and database inhirited a character set from a level above at CREATE time
  Some optimization to reduce rules number