Bug#826035: test-suite failures on 32bit architectures

[Jeremy Bicha]

Control: severity -1 important

As discussed on IRC, I'm lowering the severity to not block the
migration of the updated package to testing. These tests have been
failing for a while now but probably no one noticed because test
failures didn't fail the build until we converted to dh. The test
failures have been reported upstream.

Thanks,
Jeremy