bootstrap-tools-cross: Rename bootstrap file jobs to be more descriptive

Rename files in `bootstrap-files/` to match jobs in `make-bootstrap-tools-cross`.

Should make automating the bootstrap files easier.

```nix
$ nix repl --file ./pkgs/top-level/release-cross.nix
nix-repl> bootstrapTools
{ aarch64-unknown-linux-gnu = { ... }; aarch64-unknown-linux-musl = { ... }; armv5tel-unknown-linux-gnueabi = { ... }; armv6l-unknown-linux-gnueabihf = { ... }; armv6l-unknown-linux-musleabihf = { ... }; armv7l-unknown-linux-gnueabihf = { ... }; mips64el-unknown-linux-gnuabi64 = {... }; mips64el-unknown-linux-gnuabin32 = { ... }; mipsel-unknown-linux-gnu = { ... }; powerpc64le-unknown-linux-gnu = { ... }; riscv64-unknown-linux-gnu = { ... }; x86_64-unknown-linux-musl = { ... }; }
```

Additionally if non-linux bootstrap files are added to
`make-bootstrap-tools-cross` then there won't be any renaming needed.

0 files changed, 0 insertions, 0 deletions