Rollup merge of rust-lang#102215 - alexcrichton:wasm-link-whole-archive, r=estebank

Implement the `+whole-archive` modifier for `wasm-ld`

This implements the `Linker::{link_whole_staticlib,link_whole_rlib}` methods for the `WasmLd` linker used on wasm targets. Previously these methods were noops since I think historically `wasm-ld` did not have support for `--whole-archive` but nowadays it does, so the flags are passed through.

Author: Manishearth