NEW YORK (Reuters) - A U.S. judge has extended a freeze on a Swiss account linked to possible insider trading in H.J. Heinz Co call options just before the ketchup maker agreed to be bought by Warren Buffett's Berkshire Hathaway Inc and Brazilian investment firm 3G Capital. The U.S. Securities and Exchange Commission had last Friday won a temporary freeze of the account at Goldman Sachs & Co, one day after Berkshire and 3G announced a $23 billion takeover of Heinz. U.S. ...