Bug#907346: slic3r FTBFS on big endian: #error "admesh works correctly on little endian machines only!"

[Tobias Frost]

Hi,

Looks like #869638 of slic3r-prusa, upstream 
https://github.com/prusa3d/Slic3r/issues/532

However, prusa's version has diverged and changed one file to c++,
so the patch is unfortunatly not directly applicable and needs porting.

--
tobi