Human Grunt (hgrunt) SC4 Supported

It's annoying see when a player pick up this model and starts to move in a weird way. The model hasn't been fixed since 3.0 and this little .mdl file fixes the animation of the Hgrunt player model of Sven Co-op 4, making it avalaible for its use.

Since zombie is official as well, why not hgrunt? Both are from HLDM.