Updated debian/config/searchplugins.conf accordingly

Closes #12545

rm: make-rhc because it produces ssl error and does not work.

It produces ssl error if the following command has been used:

     $ rhc setup

See merge request !141

We rebrand it anyways. Also, removed the non-ssl one

Remove make-ruby1.9.1 helper

The helper is unnecessary since the file `gserver.rb` has a proper license header.

See merge request !122

linux-lts-utopic: Added CONFIG_DELL_RBTN=m

The package was failing to build due to that configuration.

I'm not sure why we didn't inherit this configuration from ubuntu kernel config, but adding it to config.common.trisquel does the work.

See merge request !131