[libunwind] [libunwind][WebAssembly] Don't build libunwind.cpp (PR #73196)

[Heejin Ahn via cfe-commits]

aheejin wrote:

Hmm, yes, I thought we didn't build `libunwind.cpp` because the code next to the part I excluded was wrapped with `#ifdef __APPLE__`:
https://github.com/llvm/llvm-project/blob/a8ac930b99d93b2a539ada7e566993d148899144/libunwind/src/libunwind.cpp#L352-L432

But yeah then we build the `logAPI` part: https://github.com/llvm/llvm-project/blob/a8ac930b99d93b2a539ada7e566993d148899144/libunwind/src/libunwind.cpp#L434-L474

Will fix the message accordingly.

https://github.com/llvm/llvm-project/pull/73196