By Constance Watson LONDON (Reuters) - Sting has turned back to his childhood in the shadow of a struggling shipyard in northern England for a musical that will debut on Broadway next year and his first album of original material in 10 years. The musical, "The Last Ship", is based on Sting's experiences of living near the Swan Hunter Shipyard in Wallsend, Newcastle, and watching the demise of Britain's shipbuilding industry in the 1980s. ...