Update CMakeLists.txt to include the POWHEG dependencies.
Update CMakeLists.txt to include the dependencies.
We need the packages only in runtime because we compile powheg outside of Athena. Requires atlasexternals!1165 (merged) atlasexternals!1164 (merged) atlasexternals!1163 (merged) and new atlas externals.
Edited by Andrii Verbytskyi