Use latest bazlets

Compilation was failing in stand-alone mode as API was not pointing at
latest changes in master.

Change-Id: If275b3d95b0f239566faa1596cda0c9a5040e92a
diff --git a/WORKSPACE b/WORKSPACE
index bf42d6d..7f95b26 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "6dad39cdb50b83afa7fe57783c10b272305f97ba",
+    commit = "2c89b78092943e040377db8aad4568f426ac785a",
     #    local_path = "/home/<user>/projects/bazlets",
 )