Bug#918278: i8c build depends on python3-libi8x that is currently not in buster

[Adrian Bunk]

Source: i8c
Version: 0.0.6-1
Severity: serious
Tags: ftbfs
Control: block -1 by 875373

i8c build depends on python3-libi8x that is currently
not in buster due to #875373.