Ignore intellij ide files

Change-Id: I6209dbbe04dc3abc7ed7801f0a02c14646ae2685

.gitignore

diff --git a/.gitignore b/.gitignore
index 72f041f..1861faf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 /.settings/
 /bazel-*
 /eclipse-out/
+/.ijwb