LOS ANGELES (Reuters) – Billboard's weekly music chart will not include the 1 million copies of rapper Jay Z's upcoming album that were sold to electronics maker Samsung as part of a promotion, the U.S. trade magazine said on Friday. Jay Z, 43, announced last weekend that his album "Magna Carta Holy Grail" could be downloaded for free on July 4 – three days before its public release – to the first 1 million users of Samsung smartphones who had downloaded a special app. …