Updating wasm-opt example to an available pass (#4684)
Updating wasm-opt example to an available pass (#4684)

The wasm-opt example was using a test pass that was deleted. Updating to use one of the test passes in test/lit/passes.
WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen