there's a new upstream 5.0.4, saying it's building with newest libxml,
however the tests fail the same way as they do with 5.0.3.
- Bug#1106273: ruby-libxml ftbfs with libxml 2.14.x from expe... Matthias Klose
- Bug#1106273: new upstream 5.0.4 Matthias Klose
- Bug#1106273: disabled tests for new libxml 2.14.x Matthias Klose