[Pkg-rust-maintainers] Bug#931002: Updating crates for Debian stable release

[Ximin Luo]

I am on vacation for the next two weeks, please can someone else deal with the following:

Due to Firefox we updated/unblocked rustc 1.34.2 for Debian Testing (and the next Debian Stable) release.

This causes two FTBFS bugs for crates which no longer build on rustc 1.34.2:

- #931002 coresimd https://crates.io/crates/coresimd
- #931003 simd https://crates.io/crates/simd

In fact these crates are deprecated and should be RMd. We also need to: 

- update encoding-rs so it doesn't depend on simd
- update packed-simd so it doesn't depend on coresimd
- package NEW core-arch package which is a new dependency of the updated packed-simd

and unblock these.

Otherwise {encoding-rs, packed-simd} and its reverse dependencies (including ripgrep) will have to be dropped from the next Debian Stable release.

X

-- 
GPG: ed25519/56034877E1F87C35
GPG: rsa4096/1318EFAC5FBBDBCE
https://github.com/infinity0/pubkeys.git