Remove bazel-genfiles from .gitignore

Change-Id: I2d80af9455f619d93a54d92b979283aa551b1e26

.gitignore

diff --git a/.gitignore b/.gitignore
index 359d093..c7cd6d6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,7 +7,6 @@
 *.iml
 *~
 /bazel-bin
-/bazel-genfiles
 /bazel-gitiles
 /bazel-out
 /bazel-testlogs