CHICAGO — CosMc’s, a new futuristic concept from McDonald’s, secretively opened its first location near Chicago Thursday. The fast-food chain originally announced that the beverage-focused shop would open in Bolingbrook, Illinois, Friday. Some locals, though, noticed small lawn signs posted on-site stating that it was open to the public — and possibly the media helicopters circling overhead. A line snaked through the adjacent mall parking lot until the wait peaked at around two-hours long. Named for CosMc (pronounced “cosmic”), a little-known company character (a space alien who visited the fi…