Auto merge of #50423 - hberntsen:armv5te_unknown_linux_musl, r=alexcrichton

Add armv5te-unknown-linux-musl target

This PR adds the armv5te-unknown-linux-musl target. The following steps should let you produce a fully statically linked binary now:
1. Running `./src/ci/docker/run.sh dist-armv5te-linux-musl`
2. Changing the run.sh script to start bash instead of the build process and running the container
3.
   ```sh
   export USER=root
   export PATH=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin:/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin:$PATH
   ```
4. Configuring Cargo
   ```yaml
   [target.armv5te-unknown-linux-musl]
   linker = "arm-linux-gnueabi-gcc"
   ```
5. Building a project
   ```sh
   cargo new --bin hello
   cd hello
   cargo build --target=armv5te-unknown-linux-musl --release
   ```

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