Validation layer fixes for compressedtexsubimage* dEQP tests * Change order of validation in ValidateCompressedTexSubImage3D to get the errors in the same order as the dEQP tests are expecting them. * ES 3.1: Section 8.7, page 169: If the internal format is ETC2/EAC, the target must be a GL_TEXTURE_2D_ARRAY. * ES 3.1: Section 8.7, page 171: For sub textures, ET2/EAC formats also requires exact size to be validated. Bug: angleproject:2327 Change-Id: Ib049c70a52ed5683885a73fb06503898a85786d1 Reviewed-on: https://chromium-review.googlesource.com/897726 Commit-Queue: Luc Ferron <lucferron@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>