It was released on May 23rd. Reproducible: Always
On that note, it would be nice if the ebuild removed pointless la files/static archives. Their installation is an effect of a hack in the build system - there's a longer story here, but the bottom line's still that they're pointless. It happens in 2.2.0 too - I don't remember if it happened in earlier.
2.2.1 is in portage.