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
  Bazel: Migrate workspace status script to python
  Upgrade bazlets to latest stable-2.15
  Upgrade bazlets to latest stable-2.14
  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: Ifa24abdb76ff9955d39ef4d3c3f2a85992341e55