Bug#1032165: gcc-12-cross-ports: not binNMU safe

[Matthias Klose <doko@debian.org>]

Control: severity -1 important

updating the Built-Using tag almost always means, that you build against a new 
compiler version, also most likely modifying all the target binaries 
(lib*-cross-*), which are packaged as binary-independent packages. So a binNMU 
just doesn't make sense for the -cross packages.

Efforts to improve the situation should go into getting rid off these packages, 
however this requires britney support for dependencies on foreign architectures 
and support of the testing pocket for the so called ports architectures.