v0.11.1: Fix the waves shader panicking in the browser playground

Fixed

• The waves example stopped with "unreachable executed" in the browser
  playground. The timer that reports a slow shader read the clock, and
  the clock panics in WebAssembly. It is now skipped there, so the
  example plays. Native builds, oxframe dev and the CLI were not
  affected, so there is no new CLI release.