pass 1.7.4 will dynamically switch between xclip and wl-copy depending
on which environment is running. The (wl-clipboard or xclip) dependency
is not good enough to express this, as one could be running wayland, and
already have xclip installed.
The new Requires will install xclip and/or wl-clipboard depending on the
installation of the Xorg server and the wayland client library.
This fixes https://bugzilla.redhat.com/show_bug.cgi?id=1996323