#33 Fix opkg repository

[Michele]

Hello everyone,
when flashing the default image v0.92, from http://www.gumstix.net/overo-gm-images/ ,
the repository for updates links to http://www.gumstix.net/feeds/2008/ipk/glibc/armv7a/base
but in this folder the Packages.gz is not consistent with the folder content.
Therefore, it is impossible to perform opkg update/upgrade with the latest stable release of the overo image.

Cheers,
Michele