Special delivery!  A drone flying overhead at last night’s Longchamp bash in Soho toted the new limited-edition “ Greetings from New York” Le Pliage travel bag to its designer, Jeremy Scott.  The tastemaker celebrated his 20-year collaboration with the French luxury brand at the buzzy party, which featured a DJ set by The Misshapes. He welcomed Longchamp-clad celeb guests including Maggie Gyllenhaal, Zoey Deutch, Kate Mara, Emma Roberts, Lourdes Leon, Coco Rocha, Ashley Benson, Joan Smalls,