Merge branch 'stable-2.15' into stable-2.16

* stable-2.15:
  Upgrade bazlets to latest stable-2.15
  Bump required bazel version to 1.0.0rc2
  Upgrade bazlets to latest stable-2.14

Change-Id: I8566c68c4e2cf777aafa7602e69d00618e583b19
diff --git a/WORKSPACE b/WORKSPACE
index ea653a7..1c59ec3 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "5f03aec7c72e743079ea2ecad5530f4684ca7d45",
+    commit = "3df1fac2202ac2a42cec61fac8c502178c9af391",
     #local_path = "/home/<user>/projects/bazlets",
 )