s/\r\n/\n/ in mysql-test/*/system_mysql_db*

according to http://www.bitkeeper.com/Documentation.FAQS.Windows_NT.html


mysql-test/t/system_mysql_db.test:
  s/\r\n/\n/
mysql-test/t/system_mysql_db_fix-master.opt:
  s/\r\n/\n/
mysql-test/t/system_mysql_db_fix.test:
  s/\r\n/\n/
mysql-test/t/system_mysql_db_refs.test:
  s/\r\n/\n/
mysql-test/r/system_mysql_db.result:
  s/\r\n/\n/
mysql-test/r/system_mysql_db_refs.result:
  s/\r\n/\n/