Bug#860656: python-biplist: FTBFS on i386: dh_auto_test: pybuild --test --test-nose -i python{version} -p 2.7 returned exit code 13

[Hans-Christoph Steiner]

The tests don't need fixing, they are pointing out a real issue, check
the bug report to upstream for more info.  If we just want to ship with
this specific issue not fixed, then patching the test could lead people
astray.  Instead, seems like we should just disable that test on 32-bit
archs.