Add IntelliJ project files into ignore list. (knative#3817)

mdemirhan · knative-prow-robot · commit 763c13d81714 · 2019-04-25T14:54:29.000-07:00
diff --git a/.gitignore b/.gitignore
@@ -4,7 +4,8 @@
 # Editor/IDE specific settings
 .idea
 .vscode/
+*.iml
 
 # Temporary output of build tools
 bazel-*
-*.out
+*.out
