Correction to Hungarian plane app requested by translator.
(The context was not clear in my original request for the terms.)

R=neil.fraser@gmail.com

Review URL: https://codereview.appspot.com/9234043

git-svn-id: http://blockly.googlecode.com/svn/trunk@825 c400ca83-b69d-9dd7-9705-49c6b8615e23