Bug#1101952: [Pkg-rust-maintainers] Bug#1101952: rust-src - please make multi-arch: foreign

[NoisyCoil]

For me it worked without M-A: allowed in a test package, the reason (I 
think) being rust-src:native means rust-src:amd64, which means 
Multi-Arch should be ignored?

I think M-A: allowed is only needed for :any, not :native?