std: only depend on dlmalloc for wasm*-unknown It was already filtered out for emscripten, but wasi doesn't need dlmalloc either since it reuses `unix/alloc.rs`.
std: only depend on dlmalloc for wasm*-unknown It was already filtered out for emscripten, but wasi doesn't need dlmalloc either since it reuses `unix/alloc.rs`.