remove 'unsigned', 'zerofill' attributes
from DATA_TYPE column value.


mysql-test/suite/funcs_1/r/is_columns_innodb.result:
  result fix
mysql-test/suite/funcs_1/r/is_columns_memory.result:
  result fix
mysql-test/suite/funcs_1/r/is_columns_myisam.result:
  result fix
sql/sql_show.cc:
  remove 'unsigned', 'zerofill' attributes 
  from DATA_TYPE column value.