Merge branch 'stable-2.16'

* stable-2.16:
  Update javamelody-core to 1.75.0
  Upgrade bazlets to latest stable-2.16 to build with 2.16.1 API
  Bazel: Include eclipse-out directory in .bazelignore
  MonitoringTopMenu: Prepend path to the top menu item
  Add explanatory comment to empty BUILD file(s)

Change-Id: I357ea4ee77d1e5279247cd2731f609fbaca8cb5c