We decided some time ago to make our lives easier and raise the
lower bound on the feature level to 10.1 from 10.0. This makes
using some multisample samplers easier in HLSL. It is also a very
small and poorly suppoted fraction of our userbase.

BUG=angleproject:1381

Change-Id: I25d330a6097f71ec772899d49ff5d3a97c0cb0d2
Reviewed-on: https://chromium-review.googlesource.com/346102Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>