web : falling-balls-mpp : skiko.js is not created for the first `jsBrowserDistribution` run

[theapache64]

Issue

When jsBrowserDistribution run for the first time, skiko.js is missing from the distributions directory, resulting in onWasmReady being undefined in the web console

Steps to reproduce

https://user-images.githubusercontent.com/9678279/187063755-8a35a2b8-a078-4426-8950-7c97ac721ced.mov