I know that but i have several graphic artifacts at startup and shutdown with LibreELEC 8.2.5 and Raspberry Pi 3 Model B, LibreELEC 7.0 does not start. So i'm trying to build old releases.
RPi 3 hardware was released in Feb 2016 so the OE 6.0 codebase which predates that by a year? is not going to boot even if you do figure out the missing package dependencies. LE 7.0.3 should be fine. NB: Running older software likely introduces more bugs than it might solve, so a current milhouse testing release (newer everything than LE 8.2.5) is probably more productive; and if the issue still exists, report the problem to the milhouse support thread in Kodi forums instead of working backwards with old code.