Bug#877823: gcc-7-cross-ports build depends on removed transitional package realpath

[Adrian Bunk]

Source: gcc-7-cross-ports
Version: 6
Severity: serious

gcc-7-cross-ports build depends on the transitional package realpath,
removed in coreutils 8.28-1.

The realpath program is part of the
(essential) coreutils package since 8.23-1.