Update AGG and Skia expectations

CL [1] changes the rendering behavior for closed 0-length paths for
both AGG and Skia. Update the corpus tests expectations accordingly.

[1] https://pdfium-review.googlesource.com/c/pdfium/+/103632

Bug: pdfium:1812, pdfium:1983
Change-Id: Ie61ebab158f94a491b5993147a1f36a93b0df570
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium_tests/+/103631
Reviewed-by: Lei Zhang <thestig@chromium.org>
4 files changed