Smallish test of iOS 11.2.2-11.2.5 WebAssembly failure with memory loads/stores.

Live copy at https://brionv.com/misc/min-wasm-fail/

See ready-to-use source which can run synchronously in browser.

See emscripten bug tracker: emscripten-core/emscripten#6042

This code is released as public domain -- anyone may use it for any purpose.