Add encoding to the <ceylon-compile> for the tests, to avoid the annoying portability error message.
Add encoding to the <ceylon-compile> for the tests, to avoid the annoying portability error message.

lucaswerkmeister/ceylon.language,unratito/ceylon.language,jvasileff/ceylon.language,ceylon/ceylon.language,jvasileff/ceylon.language,ceylon/ceylon.language,unratito/ceylon.language,lucaswerkmeister/ceylon.language