Update SerenityOS JBIG2 test files

https://github.com/SerenityOS/serenity/compare/38ebe688245ac2395...cb4230b21de9bbab3

Not sure if there's a way to limit the comparison to just the
Tests/LibGfx/test-inputs/jbig2/json folder:

https://github.com/SerenityOS/serenity/commits/master/Tests/LibGfx/test-inputs/jbig2/json

PDFium passes all the new tests.

Bug: 42271957
Change-Id: I0767c9e0ed4b5c73638d516676be3bc24b6e624d
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium_tests/+/138650
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Nico Weber <thakis@google.com>
diff --git a/third_party/jbig2/README.pdfium b/third_party/jbig2/README.pdfium
index 3503a33..6ef2e65 100644
--- a/third_party/jbig2/README.pdfium
+++ b/third_party/jbig2/README.pdfium
@@ -1,7 +1,7 @@
 Name: SerenityOS JBIG2 tests
 URL: https://github.com/SerenityOS/serenity/tree/master/Tests/LibGfx/test-inputs/jbig2/json
 Version: HEAD
-Revision: 38ebe688245ac2395
+Revision: cb4230b21de9bbab3
 Update Mechanism: Manual
 Security Critical: no
 Shipped: no
diff --git a/third_party/jbig2/bitmap-composite-or-xor-replace-text.pdf b/third_party/jbig2/bitmap-composite-or-xor-replace-text.pdf
index 71dab5c..30c4736 100644
--- a/third_party/jbig2/bitmap-composite-or-xor-replace-text.pdf
+++ b/third_party/jbig2/bitmap-composite-or-xor-replace-text.pdf
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diff --git a/third_party/jbig2/bitmap-symbol-textbottomleft.pdf b/third_party/jbig2/bitmap-symbol-textbottomleft.pdf
index eea842c..b7f62e1 100644
--- a/third_party/jbig2/bitmap-symbol-textbottomleft.pdf
+++ b/third_party/jbig2/bitmap-symbol-textbottomleft.pdf
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diff --git a/third_party/jbig2/bitmap-symbol-textbottomlefttranspose.pdf b/third_party/jbig2/bitmap-symbol-textbottomlefttranspose.pdf
new file mode 100644
index 0000000..d9136e2
--- /dev/null
+++ b/third_party/jbig2/bitmap-symbol-textbottomlefttranspose.pdf
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diff --git a/third_party/jbig2/bitmap-symbol-textbottomlefttranspose_expected.pdf.0.png b/third_party/jbig2/bitmap-symbol-textbottomlefttranspose_expected.pdf.0.png
new file mode 100644
index 0000000..02f6c0d
--- /dev/null
+++ b/third_party/jbig2/bitmap-symbol-textbottomlefttranspose_expected.pdf.0.png
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diff --git a/third_party/jbig2/bitmap-symbol-textbottomright.pdf b/third_party/jbig2/bitmap-symbol-textbottomright.pdf
index 77a8636..c8ce5d2 100644
--- a/third_party/jbig2/bitmap-symbol-textbottomright.pdf
+++ b/third_party/jbig2/bitmap-symbol-textbottomright.pdf
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diff --git a/third_party/jbig2/bitmap-symbol-textbottomrighttranspose.pdf b/third_party/jbig2/bitmap-symbol-textbottomrighttranspose.pdf
new file mode 100644
index 0000000..db49bd2
--- /dev/null
+++ b/third_party/jbig2/bitmap-symbol-textbottomrighttranspose.pdf
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diff --git a/third_party/jbig2/bitmap-symbol-textbottomrighttranspose_expected.pdf.0.png b/third_party/jbig2/bitmap-symbol-textbottomrighttranspose_expected.pdf.0.png
new file mode 100644
index 0000000..02f6c0d
--- /dev/null
+++ b/third_party/jbig2/bitmap-symbol-textbottomrighttranspose_expected.pdf.0.png
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diff --git a/third_party/jbig2/bitmap-symbol-texttopright.pdf b/third_party/jbig2/bitmap-symbol-texttopright.pdf
index 6daa1be..cddb1bb 100644
--- a/third_party/jbig2/bitmap-symbol-texttopright.pdf
+++ b/third_party/jbig2/bitmap-symbol-texttopright.pdf
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diff --git a/third_party/jbig2/bitmap-symbol-texttoprighttranspose.pdf b/third_party/jbig2/bitmap-symbol-texttoprighttranspose.pdf
new file mode 100644
index 0000000..ffa8b1c
--- /dev/null
+++ b/third_party/jbig2/bitmap-symbol-texttoprighttranspose.pdf
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diff --git a/third_party/jbig2/bitmap-symbol-texttoprighttranspose_expected.pdf.0.png b/third_party/jbig2/bitmap-symbol-texttoprighttranspose_expected.pdf.0.png
new file mode 100644
index 0000000..02f6c0d
--- /dev/null
+++ b/third_party/jbig2/bitmap-symbol-texttoprighttranspose_expected.pdf.0.png
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diff --git a/third_party/jbig2/bitmap-symbol-texttranspose.pdf b/third_party/jbig2/bitmap-symbol-texttranspose.pdf
new file mode 100644
index 0000000..d867357
--- /dev/null
+++ b/third_party/jbig2/bitmap-symbol-texttranspose.pdf
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diff --git a/third_party/jbig2/bitmap-symbol-texttranspose_expected.pdf.0.png b/third_party/jbig2/bitmap-symbol-texttranspose_expected.pdf.0.png
new file mode 100644
index 0000000..02f6c0d
--- /dev/null
+++ b/third_party/jbig2/bitmap-symbol-texttranspose_expected.pdf.0.png
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diff --git a/third_party/jbig2/bitmap-symbol.pdf b/third_party/jbig2/bitmap-symbol.pdf
index cf6d4c0..9211a1e 100644
--- a/third_party/jbig2/bitmap-symbol.pdf
+++ b/third_party/jbig2/bitmap-symbol.pdf
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