RFS: ruby-gettext, ruby-raindrops, ruby-tzinfo

[Hleb Valoshka <375gnu@gmail.com>]

Hi team,

I've pushed new upstream packages for ruby-gettext, ruby-raindrops and
ruby-tzinfo. Please review and upload them.

Actually ruby-tzinfo 1.2.2 lives in git from fall but there were
concerns that it may break rails, I think it's a very time to check
this :)