If anything, the persistence running hypothesis in some way discredits the idea that hominids relied on rotten meat. If they could catch fresh prey, why eat spoiled meat? Yet our stomach acid has a very low pH, more acidic than even that of cats.
What's more likely, in my opinion, is hominids began to supplement their diet by eating the leftover kills of larger predators as well as any rotting carcasses they may have encountered, and then developed hunting strategies around when they began developing tools. Even having sharp knives made of stone or volcanic glass would have been an obvious advantage in food procurement, and it wouldn't have taken millions of years to figure out that slashing an animal's throat in the right place would take it down quickly. No need for persistence running at all if a group can corner a mammoth or buffalo or lead it to a dead end.