[arch-dev-public] [review] News Item: Core Rebuild

[Aaron Griffin]

Please review:

Core Rebuild
---------------------
Due to recent glibc and gcc upgrades, we figured it'd be best to
rebuild the whole core repo off the new toolchain, to take advantage
of the latest-and-greatest changes.

Daniel has taken up this task and rebuild all packages for both
architectures, and move them to [testing].

If you run into any problems, please report them on the bug tracker.