Add gradient_many_stops.pdf

Add a test file that renders correctly with Skia, but not with AGG. The
test expectation is the Skia output.

Bug: pdfium:489
Change-Id: Ibbaccacc8e4d8d47929a5c4c6be7a24f03e1e91f
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium_tests/+/104770
Reviewed-by: K. Moon <kmoon@chromium.org>

third_party/skia/20180916_098c1355/gradient_many_stops.pdf

diff --git a/third_party/skia/20180916_098c1355/gradient_many_stops.pdf b/third_party/skia/20180916_098c1355/gradient_many_stops.pdf
new file mode 100644
index 0000000..c839853
--- /dev/null
+++ b/third_party/skia/20180916_098c1355/gradient_many_stops.pdf
Binary files differ

third_party/skia/20180916_098c1355/gradient_many_stops_expected.pdf.0.png

diff --git a/third_party/skia/20180916_098c1355/gradient_many_stops_expected.pdf.0.png b/third_party/skia/20180916_098c1355/gradient_many_stops_expected.pdf.0.png
new file mode 100644
index 0000000..44549c9
--- /dev/null
+++ b/third_party/skia/20180916_098c1355/gradient_many_stops_expected.pdf.0.png
Binary files differ