[Bf-linux] Chroot wiki updated

[Ken Hughes]

Just an FYI:

I've updated the wiki page a little:
* change chroot install script to set up locales and install extra 
packages without user input
* describe how to build GCC 4.2 for debian etch (including a script I 
hope works)

I still haven't tried managed to build a 32-bit chroot under 64-bit, and 
use it to build a 32-bit tarball (or the other way around).  Since I 
have 32-bit and 64-bit machines this isn't a issue for me, but if 
someone else figures it out by all means have documenting on the wiki page.

Ken