Skip InstancingTest.NonIndexed* with non-zero Offset on Mac Mini 8.1 Bug: angleproject:5271 Change-Id: I644b28670ce0501407797f7ae7e749a66a63d84e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2508975 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>