Update bazlets to fix build with bazel 0.23

- Use target JDK for GWT compilation

Bug: Issue 10536
Change-Id: Ia8162d83ce616d9f571f57a34228b57f7fe4e1d3

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index adcebde..d360e0c 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "90314da56cc057c2c8201dab43dfa98e84235957",
+    commit = "52c0a07ea4c41dca2bafbcc142d42ed33785628f",
     #local_path = "/home/<user>/projects/bazlets",
 )