xinput: Add XI v2.1
xinput: Add XI v2.1

Introduced with v2.1 has been Raw event support and therefor 5 new
events: Raw{Key,Button}{Press,Release} and RawMotion.

Signed-off-by: Daniel Martin <5ae2633454ceb931c1fd86ffad586b4dfc721833@gmail.com>

nbaum/xcb-proto,nbaum/xcb-proto