Install mongo_console again
Install mongo_console again

With the import of mongo-ruby-driver v2.0 (1fc62d949269231e8e7639589a336276390dcc65), the mongo_console was removed. While the executable was later reintroduced (a30d72cfc17a23c95a08e1f275ae395120b3d3c7), the RubyGems wrapper it was not installed into /usr/bin anymore, since it was never specified in .gemspec again.

This PR fixes the situation, since this seems to be non-intentional overlook.
estolfo/mongo-ruby-driver,estolfo/mongo-ruby-driver,saghm/mongo-ruby-driver,mongodb/mongo-ruby-driver,jonhyman/mongo-ruby-driver,brandonblack/mongo-ruby-driver,kay-kim/mongo-ruby-driver,jonhyman/mongo-ruby-driver,wandenberg/mongo-ruby-driver,saghm/mongo-ruby-driver,mongodb/mongo-ruby-driver,mongodb/mongo-ruby-driver,kay-kim/mongo-ruby-driver