ignore .orig and .rej files (iree-org#16359)

bjacob · web-flow · commit 2a46995722de · 2024-02-09T11:46:36.000-05:00
These are typically created by the `patch` command. For exampe in iree-org#16358 i'm removing an accidentally checked-in .orig file.
diff --git a/.gitignore b/.gitignore
@@ -90,3 +90,7 @@ llvm-external-projects/iree-dialects/.cache
 
 # pkgci artifacts
 artifacts/
+
+# Side effects of local patching/merging
+*.orig
+*.rej
