Fix typo in `--srcdir` option in echo message status of mysql_install_db

scripts/mysql_install_db.sh

@@ -210,7 +210,7 @@ cannot_find_file()
   echo
   echo "If you compiled from source, you need to either run 'make install' to"
   echo "copy the software into the correct location ready for operation."
-  echo "If you don't want to do a full install, you can use the --srcddir"
+  echo "If you don't want to do a full install, you can use the --srcdir"
   echo "option to only install the mysql database and privilege tables"
   echo
   echo "If you compiled from source, you need to either run 'make install' to"