Gameloft has released an update to its popular game N.O.V.A. adding support for iOS 4 and the iPhone 4. N.O.V.A. 1.2.1 adds a gyroscopic control mode for iPhone 4 users with a complete 3D range of movement and provides enhanced high-resolution graphics to take advantage of the iPhone 4 Retina Display. The update also adds Fast App Switching for users of multitasking-capable iOS 4 devices. N.O.V.A. is a first-person shooter that puts the player in…