Cleaned up mysql_upgrade --help and mysqlcheck --help

client/mysql_upgrade.c:
  Increased version number.
  Marked all options that are not used 'Not used'.
  Don't write 'Looking for tool' if not using --verbose
client/mysqlcheck.c:
  Cleanup output for --help
  Reset not initialzed variable
mysql-test/r/log_tables_upgrade.result:
  Updated results
mysql-test/r/mysql_upgrade.result:
  Updated results
mysql-test/r/mysqlcheck.result:
  Updated results
mysql-test/t/log_tables_upgrade.test:
  mysql_upgrade is now run without --skip-verbose
mysql-test/t/mysql_upgrade.test:
  mysql_upgrade is now run without --skip-verbose