Merge branch 'stable-2.16' into stable-3.0

* stable-2.16:
  Upgrade bazlets to latest stable-2.15 to build with 2.15.18 API
  Upgrade bazlets to latest stable-2.15
  Upgrade bazlets to latest stable-2.14
  Bazel: Migrate workspace status script to python
  Upgrade bazlets to latest stable-2.16
  Upgrade bazlets to latest stable-2.15
  Upgrade bazlets to latest stable-2.14
  Bump Bazel version to 1.1.0

Change-Id: Icb6609761b657d5ec27320a8becf64ff5312fd50