[clang] [compiler-rt] [lld] [llvm] [Coverage][WebAssembly] Add initial support for WebAssembly/WASI (PR #111332)

[Yuta Saito via cfe-commits]

kateinoigakukun wrote:

@glandium Would you mind sharing CMake configuration? or is there any CI with that setup?

https://github.com/llvm/llvm-project/pull/111332