HDF5 and Stata I/O are broken on some architectures

HDF5 and Stata I/O are broken on some architectures

Fix some issues, warn on use and xfail tests for the remainder

HDF5 and Stata are known to fail on big-endian architectures
Stata also fails on qemu-ppc64el, but not real ppc64el

In 0.25.3 HDF5 _crashes_ on armhf, so skip
(pytest-forked allows continuing past a crash,
but still seems to fail on xfailed crashes)

Author: Andreas Tille <tille@debian.org>, Graham Inggs <ginggs@debian.org>, Yaroslav Halchenko <debian@onerussian.com>, Rebecca N. Palmer <rebecca_palmer@zoho.com>
Bug-Debian: https://bugs.debian.org/877419
Forwarded: no

Gbp-Pq: Name xfail_tests_nonintel_io.patch