Cleaning plastic bags used for sous vide
I agree with @moscafj's answer to the linked question. As long as they are thoroughly washed and dried, the bags should be safe. However, you are still left with the smell.

Some plastics will absorb odors and it can be quite unpleasant. My go to for any issue with odors in plastic is baking soda. It works well in absorbing these odors and getting them out of the plastic material. 

I would suggest placing some baking soda inside the bags and closing them up. Let them sit for a few hours or overnight. Discard the baking soda, then rinse well and dry thoroughly.  If there is a small amount of residual odor, you can repeat the process. At the most, twice should definitely take care of it.