These patterns will come in some future patch. The thing was that PGI most likely committed to the Firestarter and added camos for that instead of remember the official date of the Griffin release. Had PGI addressed the Griffin as originally promised (Griffin was added in the hotfix), there would be a camo sale for the Griffin instead.
Like previous mechs in the PP pack, the camo sale is supposed to follow the official release date, so if you had bought the PP pack in advance, the camos for those mechs (like the Shadowhawk, Tbolt, Battlemaster) were completely missing until their official dates. Eventually, you will get the camos for the Griffin... but there's no obvious ETA for it (chances are, they are working on camos for the next Assault mech).
If you opened up the camo files with your favorite zip utility, you will not see Griffin and Wolverine camos in them (you'll definitely see the Firestarter ones)... which is completely missing at the moment.
Edited by Deathlike, 23 February 2014 - 11:28 AM.