[tricium] Set skip-tricium attributes for pdfium.
This would explicitly make it so that these test expectation
files are always skipped by Tricium.
Bug: 904007
Change-Id: I05aa67ecb78cdcfe5556c1b3eb125397e78e5484
Reviewed-on: https://pdfium-review.googlesource.com/c/47770
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..11b6588
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+# Skip Tricium on expectation files.
+*_expected.txt -tricium
