git ignore new name for Bazel project dir

Change-Id: I5181c60be95696f080b08cf3ee5eb866510e4f36
(cherry picked from commit eb919abea33c825ad3f10b7558e15c154261068f)
diff --git a/.gitignore b/.gitignore
index 08fd82f..eef0a5e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 *.class
 .classpath
 .project
+.ijwb
 .pydevproject
 .settings
 .javacp*