Skip TextureNorm16Test on Nexus6P
Skip TextureNorm16Test on Nexus6P

Since either revert of the original patch or the new fix is failing
some bots, suppress it first.

https://chromium-review.googlesource.com/c/angle/angle/+/1917423
https://chromium-review.googlesource.com/c/angle/angle/+/1914127

TBR=geofflang@chromium.org

Bug: 1024387, angleproject:4089
Change-Id: I56fe0ba7e8a33f72b287528e920d6733e9cb5037
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1922602
Reviewed-by: Shrek Shao <7ae796039b2f0529765a6c4b0ab8ce931d949d23@google.com>
Commit-Queue: Shrek Shao <7ae796039b2f0529765a6c4b0ab8ce931d949d23@google.com>

ppy/angle,ppy/angle,ppy/angle,ppy/angle