x11: Add missing binding for XUngrabKey.
x11: Add missing binding for XUngrabKey.

Distrotech/vala,rvu95/vala,playya/vala,kamanashisroy/aroop,severinh/vala,rvu95/vala,tjol/vala-tjol,spidermonkdust/vala,GNOME/vala,jessevdk/vala,spidermonkdust/vala,frida/vala,Distrotech/vala,frida/vala,kamanashisroy/aroop,playya/vala,kamanashisroy/aroop,Distrotech/vala,tjol/vala-tjol,frida/vala,playya/vala,GNOME/vala,flobrosch/vala-fixes,xdave/pvala,severinh/vala,spidermonkdust/vala,GNOME/vala,frida/vala,frida/vala,flobrosch/vala-fixes,jessevdk/vala,flobrosch/vala-fixes,severinh/vala,GNOME/vala,jessevdk/vala,rvu95/vala,tjol/vala-tjol