FOXBOROUGH -- Green Day played a long set when it headlined in front of 40,000-plus fans at Gillette Stadium last Saturday. Last night, the group did just one song and it was a safe choice: ''Boulevard of Broken Dreams," though it wasn't perhaps the most cheerful track to spice a pre-game show featuring the unveiling of another championship banner for the New England Patriots. It also was curious to see Green Day wedged into a small, hideaway end-zone stage (Elton John was put on the same stage at last year's pre-game show but at least was allowed to do two...