Comment 2 for bug 1864381

I've updated the instructions with a simpler integration. The old instructions were missing the `layout` definition, which is a requirement:

```
layout:
  /usr/lib/$SNAPCRAFT_ARCH_TRIPLET/alsa-lib:
    bind: $SNAP/usr/lib/$SNAPCRAFT_ARCH_TRIPLET/alsa-lib
```

You can either copy just the layout into what you already have, which is the easiest option because it should only be missing the layout; or, you can redo the alsa configuration with the updated code on https://snapcraft-alsa.readthedocs.io/en/latest/snapcraft_usage.html