creation of gentoo i686

Based on the last gentoo-x86_64 template, I created this one.

I added : 
 - reboot.sh (in order for the tests to pass)
 - kernel.sh : CONFIG_CIFS=y (I had issues with samba without)
 - ruby_source.sh : to prepare ruby from source instead of portage (I needed the 1.9.3p327 version)
  - ruby_portage.sh : renamed from ruby.sh

Thanks for this gem! It helped me a lot!