am f74c1d2f: Add default version files into the SDK for docs/tools/platforms.

Merge commit 'f74c1d2fb76ed6f3a08c76f3c4dc7c783c39383c'

* commit 'f74c1d2fb76ed6f3a08c76f3c4dc7c783c39383c':
  Add default version files into the SDK for docs/tools/platforms.