[Skia] Update corpus test expectations

CL [1] updated raster pipeline blend stages to more closely match the
legacy blends and it changed the rendering results for some corpus
tests.

This CL updates the affected corpus tests expectations accordingly.

[1] https://skia-review.googlesource.com/c/skia/+/708229

Change-Id: Ide837d033cd30ee7806cbf2633ab232f423efdee
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium_tests/+/108970
Reviewed-by: K. Moon <kmoon@chromium.org>
87 files changed