* Update to 1.12 input stack 
* Drop input patches that have been merged upstream:
  - 600-Revert-dix-deduplicate-callers-of-DeliverDeviceEvent.patch
  - 601-Store-window-pointer-in-touch-listener-record.patch
  - 602-Factor-out-TouchEnd-generation-and-delivery.patch
  - 603-Export-TouchEventRejected-as-TouchRejected.patch
  - 604-Move-AllowTouch-to-dix-touch.c-and-rename-to-TouchAc.patch
  - 605-Check-for-proper-window-ID-when-processing-touch-all.patch
  - 606-Implement-early-touch-reject.patch
  - 607-Implement-touch-early-accept.patch
  - 608-dix-fix-an-out-of-memory-crash.patch
  - 609-Xi-handle-new-XIAllowEvents-request-in-inputproto-2..patch
  - 610-Fix-scrolling.patch
  - 611-Fix-touch-punt-crash.patch
  - 612-Fix-vcp-touches-corruption.patch
  - 613-Keep-vcp-touch-class.patch
* Fix indirect touch grab handling (LP: #929408)
  - Add temporary patch 501_touch_accept_end.patch
  - Add temporary patch 502_indirect_touch_window_set.patch