This test is to ensure the upcoming Vulkan implementation uses the right
colors for each render target.

Bug: angleproject:2361
Change-Id: Ibc6f8b474ac598a20d8cc9ac1c7fd18667370cbf
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1544972Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>