gitingore bazel-io_bazel symlink

--
Change-Id: I79da5f3a2dce50f6ad7ceadde0f3b4ec72f012de
Reviewed-on: https://bazel-review.googlesource.com/#/c/6111
MOS_MIGRATED_REVID=133571156
diff --git a/.gitignore b/.gitignore
index e6d9858..c60c36e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,7 @@
 /bazel-bazel
 /bazel-bin
 /bazel-genfiles
+/bazel-io_bazel
 /bazel-out
 /bazel-testlogs
 /bazel.iml