jb: touch debounce (#798)

## Link to GitHub Issue or related Pull Request, if one exists
n/a

## Description of change
Debouce option for touch input. Applies to all touch handlers (rawinput,
win8, win7) since it sits at the touch layer, and then consumed by jb
touch logic.

## Testing

src/spice2x/launcher/options.h

@@ -264,6 +264,7 @@ namespace launcher {
             spice2x_JubeatLegacyTouch,
             JubeatTouchAlgo,
             JubeatTouchDebug,
+            JubeatTouchDebounce,
             spice2x_RBTouchScale,
             RBTouchSize,
             RBTouchPollRate,