Jem Aswad Senior Music EditorThe Rolling Stones’ wide-ranging 2018 deal with Universal Music Group will have an interesting new outlet next month when a Stones-themed “world exclusive flagship store” will open on London’s Carnaby Street on Sept. 9.The store’s location — at 9 Carnaby Street in the city’s Soho district — is in itself a historic Stones reference, as Carnaby Street was a center of the 1960s Swinging London scene of which the group was an integral part.Called “RS No.