[libunwind][WebAssembly] Fix libunwind.cpp guard (#78230)

This should have been `&&`, meaning neither SjLj nor Wasm uses this
file.

GitOrigin-RevId: 4967d98eda48bed4a6f382d240f5a33177bc654c
1 file changed
tree: 6bf624f52565030cf8b3d045f37e754439477602
  1. cmake/
  2. docs/
  3. include/
  4. src/
  5. test/
  6. .clang-format
  7. CMakeLists.txt
  8. LICENSE.TXT