Add validation for DrawRangeElements end < start end < start must generate an INVALID_VALUE error. Before this patch INVALID_OPERATION was generated from the check which validated the actual index range against end and start in this case. BUG=angleproject:1101 TEST=dEQP-GLES3.functional.negative_api.vertex_array.* (few more subtests pass) Change-Id: Ida9c5a8bc9dc416f1955e9012e5715c0848a0307 Reviewed-on: https://chromium-review.googlesource.com/332143 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>