PolyhedronGeometry: fixed UVs for faces that straddle the seam

Fixes #3269, #3100, and #3026

Note: Materials applied to geometries that are derived from `PolyhedronGeometry` (e.g., `IcosahedronGeometry`) must have

    material.map.wrapS = THREE.RepeatWrapping;

This is because `PolyhedronGeometry` has UVs greater than 1.