Bug#938949: statsmodels: test failures on some architectures

[Rebecca N. Palmer]

Package: statsmodels
Version: 0.9.0-3
Severity: serious
Control: notfound -1 0.8.0-9

https://buildd.debian.org/status/package.php?p=statsmodels&suite=experimental

This might actually be more than one bug.  Some of the armhf ones look 
like #924036, but not all of them.

This may be reduced to non-RC with an xfail *and a user-facing warning* 
(like in #924036's xfail_kalman_armhf.patch).