Hello,
The attached patch updates testing/hdf5 to 1.8.16.
This version seems to pass all tests on x86, and is reported to also pass
all tests on x86_64.
To test, you can run this:
 abuild fetch unpack prepare build
 cd src/hdf5*/
 make test

It also re-enables build on non-x86 platforms (because I'm hoping that
the new version fixes whatever was causing the segfault on armhf). If
there's a build failure there, please contact me.

Thank you,
Isaac Dunham