BUZZ — JPM upgrades Nestle, sees sales and margins rising
* JPMorgan upgrades Swiss food and drinks group Nestle to "overweight" from "neutral", as it expects sales growth and margins to bounce back * It sees Nestle's real internal growth (RIG), or sales volumes growth, improving towards what it describes as "the crucial 2%+ level" * Broker expects 4.2% like-for-like sales gr