XInput.h has moved to libXi

[Peter Hutterer]

Just a notice, if your package requires XInput.h to build, you will need to
change the BuildRequires from xorg-x11-proto-devel to libXi. The header file
has moved there.

Reason: it's the library header file and shouldn't have been in the proto
package in the first place (this applies to upstream as well of course).

This applies to Rawhide only, not F11.

Cheers,
  Peter