glbench: Update ref images for Qualcomm sc7180 (again)

Update the ref images again due to the graphic stack change.

BUG=b:158238559
TEST=passed graphics.GLBench.hasty on lazor rev1

Change-Id: If9201cc63839816d922c4879393bc1dbe116c847
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/glbench/+/2347063
Reviewed-by: Ilja H. Friedel <ihf@chromium.org>
Tested-by: Ilja H. Friedel <ihf@chromium.org>
Tested-by: Philip Chen <philipchen@chromium.org>