add xcb-atom to pkg-config calls
add xcb-atom to pkg-config calls

ravinrabbid/i3lock-svg,MartinRogalla/BlueArch,shiver/i3lock,BenElgar/i3lock,ravinrabbid/i3lock-svg,freestyl3r/i3lock,sebastian-frysztak/i3lock-color,rtfb/i3lock,ramnes/i3lock,stettberger/i4lock,kuruczgyurci/i3lock,endir/i3lock,kuruczgyurci/i3lock,Kamori/i3lock,popoffka/i3lock,koebi/i3lock,sebastian-frysztak/i3lock-color,popoffka/i3lock,Stautob/i3lock,Darkanmoore/i3lock_cam,tkuipers/i3lock,ravinrabbid/i3lock-clock,freestyl3r/i3lock,sm4tik/i3lock,kuruczgyurci/i3lock,romuald/i3lock