Fix a breakage due to a bad paste in rb-site.
Fix a breakage due to a bad paste in rb-site.

The rb-site version information, which was working when I developed it,
broke sometime before being committed. There was an "os." that was
duplicated. This prevented upgrades.

The duplicate "os." is now fixed.

chipx86/reviewboard,reviewboard/reviewboard,chipx86/reviewboard,brennie/reviewboard,brennie/reviewboard,brennie/reviewboard,brennie/reviewboard,reviewboard/reviewboard,chipx86/reviewboard,reviewboard/reviewboard,reviewboard/reviewboard,chipx86/reviewboard