Merge branch 'stable-2.16'

* stable-2.16:
  Upgrade bazlets to latest stable-2.16 to build with 2.16.7 API
  Upgrade bazlets to latest stable-2.15 to build with 2.15.12 API
  Upgrade bazlets to latest stable-2.14 to build with 2.14.19 API
  Update bazlets to latest stable-2.16 to get fixed js.bzl

Change-Id: If78df19176171779d5b77534a20d22e596994b51