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

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.