Adding messages for licensing option of UploadWizard

Augmenting UploadWizard's configuration to have more licenses has
been rejected within I211bb8eb90ca701.

Adding these messages to the Wikimedia licensing messages has been
rejected at I330d889b457b477.

This patch supplies the messages required for Iffbe65bfa3f8c34d adding
PD-old-70-1923 as a licensing option.

Change-Id: I4397c70ff885c75d07431bb4561f81bd083a9736
Merge "Adding messages for licensing option of UploadWizard"