Also run `build_playerglobal` in `grunt shu`

I keep forgetting that, and it makes sense there.
Don't apply CanvasPattern#setTransform polyfill if the browser doesn't have support for Path2D#addPath

Because the polyfill just breaks in that case.
Merge pull request #1371 from tschneidereit/nat

Don't apply CanvasPattern#setTransform polyfill if the browser doesn't have support for Path2D#addPath