Update bazlets to latest revision on master

- Fix default label in java_doc rule

Change-Id: Ia23c7ed5de6c285a5fc504dc2a3d14b2fde094ec

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 5da8f94..b5dbf05 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -16,7 +16,7 @@
 load("//tools:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "3b4579bcb5978337a66c973c0371e953d9c6762b",
+    commit = "2c9d995f712f6531e45756f80431b460c6183f8d",
     # local_path = "/home/<user>/projects/bazlets",
 )