bug#26253: Coreutils 8.26 test failure on arm-linux-gnueabihf

[Ludovic Courtès]

I just pushed a fix:

  
https://git.savannah.gnu.org/cgit/guix.git/commit/?h=core-updates&id=d1e3f59c9b8d1be79eded04fe23cceb56b4372f0

Ludo’.