Merge branch 'stable-3.2'

* stable-3.2:
  Upgrade bazlets to latest master to build with 3.2.3 API
  Upgrade bazlets to latest stable-3.1 to build with 3.1.8 API
  Upgrade bazlets to latest stable-3.0 to build with 3.0.12 API
  Upgrade bazlets to latest stable-2.16 to build with 2.16.22 API

Switch to the snapshot API to build stand-alone successfully, until the
next release (API) that contains the previously adapted code for master.

Change-Id: I0a3ee3335ef53b8d7b10e4323000ee0cfc602ee2