Ignore flatten related files. (#3885)

chickenlj · ralf0131 · commit 3a5f9054fa60 · 2019-04-18T10:51:41.000+08:00
diff --git a/.gitignore b/.gitignore
@@ -29,3 +29,6 @@ target/
 .DS_Store
 Thumbs.db
 *.orig
+
+# flatten ignore
+.flattened-pom.xml
