Update expectations for some corpus tests

The Skia rendering results for some corpus tests are improved by [1].
This CL updates their expectations accordingly.

[1] https://pdfium-review.googlesource.com/96492

Bug: pdfium:1788
Change-Id: If6abf9af93120806eccaeb923e0855a06f977118
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium_tests/+/96434
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/fx/mulobj/1/1_10_watermark_expected_skia.pdf.0.png b/fx/mulobj/1/1_10_watermark_expected_skia.pdf.0.png
new file mode 100644
index 0000000..aa9b102
--- /dev/null
+++ b/fx/mulobj/1/1_10_watermark_expected_skia.pdf.0.png
Binary files differ
diff --git a/fx/mulobj/1/1_10_watermark_expected_skia_mac.pdf.0.png b/fx/mulobj/1/1_10_watermark_expected_skia_mac.pdf.0.png
new file mode 100644
index 0000000..21d15bc
--- /dev/null
+++ b/fx/mulobj/1/1_10_watermark_expected_skia_mac.pdf.0.png
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diff --git a/fx/other/group_xobject_expected_skia.pdf.0.png b/fx/other/group_xobject_expected_skia.pdf.0.png
new file mode 100644
index 0000000..33a98c7
--- /dev/null
+++ b/fx/other/group_xobject_expected_skia.pdf.0.png
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diff --git a/pdfium/bug_883026_expected_skia.pdf.0.png b/pdfium/bug_883026_expected_skia.pdf.0.png
index 21d6aa1..1013f7a 100644
--- a/pdfium/bug_883026_expected_skia.pdf.0.png
+++ b/pdfium/bug_883026_expected_skia.pdf.0.png
Binary files differ