Fix incorrect format set being used for destination copy formats.
Fix incorrect format set being used for destination copy formats.

This validation matches Chrome's.

BUG=angleproject:1932

Change-Id: I2dc75c21924231ab75000dff92ef92cbc12adf55
Reviewed-on: https://chromium-review.googlesource.com/538956
Reviewed-by: Geoff Lang <b6fc25fe0362055230985c05cbfa8adb741ccc0f@chromium.org>

MSOpenTech/angle,ecoal95/angle,ppy/angle,MSOpenTech/angle,ecoal95/angle,ppy/angle,ecoal95/angle,ecoal95/angle,ppy/angle,MSOpenTech/angle,MSOpenTech/angle,ppy/angle,ecoal95/angle