Update Skia expectations for eager flushing

Updates Skia expectations for minor anti-aliasing differences resulting
from eagerly flushing paths. Eagerly flushing sends simpler paths to
Skia, which causes Skia to switch to a different anti-aliasing method.

Bug: pdfium:1963
Change-Id: I4652c3dd00484132dabfc316d76aaa5acd59427f
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium_tests/+/104395
Reviewed-by: Nigi <nigi@chromium.org>