Add python3 support

Bump bazlets and fix the workspace_status.py helper.

$ git log --no-merges --oneline ^a52e3f3 cd9b114
cd9b114 Upgrade Bouncy Castle to 1.72
b2b8548 download to GERRIT_CACHE_HOME when set
2d0cc7e Migrate to python 3
6311520 tools/maven/package.bzl: Use bazelisk instead bazel

Change-Id: Ic88538d9e072d71bb6ca70555ccdc93bb465b1c4

.bazelrc

diff --git a/.bazelrc b/.bazelrc
index 3ae03ff..f9248ea 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -1,2 +1,2 @@
-build --workspace_status_command="python ./tools/workspace_status.py"
+build --workspace_status_command="python3 ./tools/workspace_status.py"
 test --build_tests_only

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 5e4b7ea..11075ae 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -8,7 +8,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "a52e3f381e2fe2a53f7641150ff723171a2dda1e",
+    commit = "cd9b114339913aad2c9981e387fd151123f40a44",
     #local_path = "/home/<user>/projects/bazlets",
 )
 

tools/workspace_status.py

diff --git a/tools/workspace_status.py b/tools/workspace_status.py
index d948424..fb5ec6d 100644
--- a/tools/workspace_status.py
+++ b/tools/workspace_status.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # This script will be run by bazel when the build process starts to
 # generate key-value information that represents the status of the