Upgrade bazlets to latest stable-2.16 to build with 2.16.14 API

Change-Id: Ia25f80147f5ed793c4b80d33c9a25d342c1bcc13

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index acfcc56..d5bc6d9 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "23d849dfd1876c1b4b88efa55a4f716895e33fa3",
+    commit = "100fe2760d3a71a97cb1e04a4424e91f27e88f12",
     #local_path = "/home/<user>/projects/bazlets",
 )