`patternTransform` does not render properly on iOS

Bug

<Pattern> with patternTransform property does not render properly on iOS.

Repro

https://snack.expo.io/YEddb4zti

Running it on Android and iOS produce different results.

Workaround

I didn't read the code thoroughly, maybe we can pre-combine viewBox transform with patternTransform at the time we create the pattern object?