I've been building master branch for Odroid C2 and encountered encoding issues (build crashed).
Turns out I've only enabled pl_PL.UTF-8 on my system, after I've enabled en_US.UTF-8 everything went fine.
Error was related to python package meson.
This more a configuration issue than bug, but validating this earlier on would help avoid such issue.
Specially that this is my first attempt to build Libreelec.
Best regards and keep up the great work!