Add (maybe missing) --local option to "gem install"
Add (maybe missing) --local option to "gem install"

I don't use "rake gem:install". So I'm not sure the change is correct or
not...

[ruby-gnome2-devel-en]

Reported by Detlef Reichl. Thanks!!!

kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2