Raw Wasm module display with byte code offsets

This tests that the DevTools properly displays the raw-module.wasm as a single file using byte code offsets to refer to the individual functions and expressions within the file.

Steps

1. Open DevTools
2. Reload this page
3. Look for raw-module.wasm in the Sources / Debugger panel, this should be a single file with three Wasm functions $a, $b and $c inside.