Update Skia test expectations for Skia roll

See https://pdfium-review.googlesource.com/147074.

Change-Id: I40d4f2413b8e75b4dc6bb53f635ca716713fe801
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium_tests/+/147630
Reviewed-by: Lei Zhang <thestig@chromium.org>