[examples] Water Example / Perlin Noise broken on Chrome for Android

[hmans]

It's looking very broken. Tested on Pixel 3a and OnePlus 6T. All other platforms/browsers I've tried so far don't have the issue.

Things to try:

• Is this maybe related to the new postprocessing?
• Could it be related to the new precision setting?
• It only happens with the extra FBM noise. If I remove that, everything is fine (but of course the waves look a lot smoother, because the extra noise is missing.)
• A possible culprit might be our Perlin Noise implementation, which the FBMNoise unit is using.

[hmans]

I've disabled the FBM noise layer for the waves for the time being. Without them, everything works (but the waves of course look very terminatory.) Will hopefully find the cause for this later when I'm a little more familiar with the noise implementations. ;)

[hmans]

Possibly related: FarazzShaikh/glNoise#1