Absolute ir mouse doesn't work with xf86-input-libinput

[arpruss]

This commit to xf86-input-libinput makes wminput's IR mouse mode not work (e.g., on Raspbian): https://github.com/whot/xf86-input-libinput/commit/3d6afca975e5c54d458974ca2e9ada3df209587c

I kludgily made it work again by changing one some REL to ABS ioctl calls in uinput, but I bet I broke some other functionality. Here's what I did: https://github.com/arpruss/cwiid/commit/4b3fda9a958fad74c2354b68c3f4389016d87b24