Rebuild rbenv + rbenv-ruby-1.9.3-p392 for Precise

To be submitted to the main GOV.UK PPA. Bumped dist version to indicate that
they have been rebuilt and settled.
Rebuild rbenv + rbenv-ruby-1.9.3-p392 for Lucid

To be submitted to the main GOV.UK PPA. Bumped dist version to indicate that
they have been rebuilt and settled.