Ignore files produced by bazel builds

Change-Id: I8df4515f9151fbf046b88ed7ea231ab48363b45e
diff --git a/.gitignore b/.gitignore
index f65b29a..5190347 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,3 +37,5 @@
 sonar-project.properties
 
 out/
+
+bazel-*