[3dprinter-general] cura-engine regression failures

[Christoph Berg]

cura-engine fails on most architectures:

https://buildd.debian.org/status/logs.php?pkg=cura-engine&ver=1%3A4.4.1-1

Fine are amd64, mipsel, sparc64, and x32. (m64k cheats by building
with "nocheck")

I opened issues upstream:
https://github.com/Ultimaker/CuraEngine/issues/1192 (i386)
https://github.com/Ultimaker/CuraEngine/issues/1193 (arm*, ppc64el)
https://github.com/Ultimaker/CuraEngine/issues/1194 (mips64el, ia64)

Let's see what happens now...

Christoph