Documentation for wasmer 3 fails to build for docs.rs

[silwol]

Describe the bug

https://docs.rs/ contains documentation built for all crates that are published on https://crates.io/. Their infrastructure attempts to build the documentation, but that failed for wasmer 3.0.0-alpha.4. I consider API documentation availability on https://docs.rs/ very important, as it's the go-to location for many who want to develop something against a crate API. Therefore we should get it working with one of the 3.0 pre-releases in order to be certain we have a proper docs.rs rendering for the final release.

Additional context

The log of the failed build can be found here. Pasting here because I don't know anything about retention of the logs at https://docs.rs/

# rustc version
rustc 1.64.0-nightly (9067d5277 2022-07-28)
# docs.rs version
docsrs 0.6.0 (f9ffabd 2022-07-24)

# build log
[INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace/builds/wasmer-3.0.0-alpha.4/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/wasmer-3.0.0-alpha.4/source:/opt/rustwide/workdir:ro,Z" "-v" "/home/cratesfyi/workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/home/cratesfyi/workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "DOCS_RS=1" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "3221225472" "--cpus" "3" "--user" "1001:1001" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--features" "compiler core cranelift engine jit native singlepass sys sys-default" "-Z" "unstable-options" "--config" "build.rustdocflags=[\"-Z\", \"unstable-options\", \"--emit=invocation-specific\", \"--resource-suffix\", \"-20220728-1.64.0-nightly-9067d5277\", \"--static-root-path\", \"/\", \"--cap-lints\", \"warn\", \"--disable-per-crate-search\", \"--extern-html-root-takes-precedence\"]" "-Zunstable-options" "--config=doc.extern-map.registries.crates-io=\"https://docs.rs/{pkg_name}/{version}/x86_64-unknown-linux-gnu\"" "-j3" "--target" "x86_64-unknown-linux-gnu", kill_on_drop: false }`
[INFO] [stdout] ff14961d8d3a166d7846b0b602ba350465903e6b288195a048dec7ed1b1376b0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ff14961d8d3a166d7846b0b602ba350465903e6b288195a048dec7ed1b1376b0", kill_on_drop: false }`
[INFO] [stderr] error: none of the selected packages contains these features: native
[INFO] running `Command { std: "docker" "inspect" "ff14961d8d3a166d7846b0b602ba350465903e6b288195a048dec7ed1b1376b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff14961d8d3a166d7846b0b602ba350465903e6b288195a048dec7ed1b1376b0", kill_on_drop: false }`
[INFO] [stdout] ff14961d8d3a166d7846b0b602ba350465903e6b288195a048dec7ed1b1376b0

I assume the relevant message is this:
[INFO] [stderr] error: none of the selected packages contains these features: native