Add third-party source files install handling.
Add third-party source files install handling.

psytra/facette,yonglehou/facette,vovkasm/facette,facette/facette,psytra/facette,vovkasm/facette,yonglehou/facette,githubert/facette,facette/facette,Skrupellos/facette,iaean/facette,iaean/facette,Skrupellos/facette,githubert/facette,vovkasm/facette,facette/facette,hirocaster/facette,githubert/facette,psytra/facette,facette/facette,hirocaster/facette,yonglehou/facette,Skrupellos/facette,iaean/facette,hirocaster/facette