Speed up wasm-reduce test (#2756)
Speed up wasm-reduce test (#2756)

The test there just wants to see that the reducer can remove
a significant amount of code. I changed it from a file of 3.6K
to 200 bytes, which is enough to see the effect, and much faster.

WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen