Merge pull request #17510 from pda/ar-create-database-error-message

rake db:create shows underlying error message.

activerecord/lib/active_record/tasks/mysql_database_tasks.rb

@@ -31,6 +31,7 @@ module ActiveRecord
           end
           establish_connection configuration
         else
+          $stderr.puts error.inspect
           $stderr.puts "Couldn't create database for #{configuration.inspect}, #{creation_options.inspect}"
           $stderr.puts "(If you set the charset manually, make sure you have a matching collation)" if configuration['encoding']
         end