D3D11: Merge FL10 and 9_3 ANGLE formats. This will let us use ANGLE formats to describe a format layout rather than a Renderer-specific usage. This in turn will let us use ANGLE formats for other Renderers, as a universal thing. BUG=angleproject:1455 Change-Id: I56492cb809d4ef6ac4b962cb12affbc853bbdaa0 Reviewed-on: https://chromium-review.googlesource.com/365269 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>