Merge branch 'stable-2.15' into stable-2.16

* stable-2.15:
  Upgrade bazlets to latest stable-2.15 to build with 2.15.16 API
  Upgrade bazlets to latest stable-2.15 to build with 2.15.15 API

Change-Id: I308491ec5c77692b75af57ba0b07671b29346721
diff --git a/WORKSPACE b/WORKSPACE
index f13f5dc..aa504ff 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "4b3ce19d8d18d9f7df56a06532723b91ea6949d0",
+    commit = "5514e42e08d7852d226849e391857d7f139f7ed9",
     #local_path = "/home/<user>/projects/bazlets",
 )