The UniformTest suppression we can work around with a patch to handle
GetUniform queries entirely in ANGLE. The suppression for BlendMinMax
is a long-standing failure for an unknown reason.

BUG=angleproject:809

Change-Id: Ib89af1579a74dc5065f169b31307678429724a7c
Reviewed-on: https://chromium-review.googlesource.com/298450Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>