drm/i915: Update DRIVER_DATE to 20171117

#define DRIVER_NAME		"i915"

#define DRIVER_DESC		"Intel Graphics"

#define DRIVER_DATE		"20171109"

#define DRIVER_TIMESTAMP	1510270206

#define DRIVER_DATE		"20171117"

#define DRIVER_TIMESTAMP	1510958822

/* Use I915_STATE_WARN(x) and I915_STATE_WARN_ON() (rather than WARN() and

 * WARN_ON()) for hw state sanity checks to check for unexpected conditions