When fuzzing asyncify, avoid optimizations with nans (#2881)
When fuzzing asyncify, avoid optimizations with nans (#2881)

We already avoid that in CompareVMs but Asyncify has the
same issue, as it also can optimize in binaryen but run in
another VM (with different nondeterministic NaN behavior).
WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen