There is reference about " good luck " as well as "ill-luck" in the Vedas.
Atharva Veda Samhita Viii-8-24 mentions about both these.
"Hence conquer, conquer, Hail! be thou the victor! Let these be conquerors and those be conquered. Good luck to these, ill luck to those men yonder! With the dark-blue-and-red our foes I cover."
Bringing of good luck is referred to in Atharva Veda Samhita xiv-1-30
"----The robe as a fair thing that brings good luck."