Don't remove openwsman/version.rb on 'make clean'
Don't remove openwsman/version.rb on 'make clean'

This fixes 'make clean; make' since 'configure_files' is executed by
'cmake' and not by 'make'

kolbma/openwsman,kolbma/openwsman,Openwsman/openwsman,Openwsman/openwsman,vcrhonek/openwsman,kkaempf/openwsman,vcrhonek/openwsman,Openwsman/openwsman,kkaempf/openwsman,vcrhonek/openwsman,kolbma/openwsman,kkaempf/openwsman,kolbma/openwsman,Openwsman/openwsman,vcrhonek/openwsman,Openwsman/openwsman,vcrhonek/openwsman,vcrhonek/openwsman,kkaempf/openwsman,kkaempf/openwsman,kkaempf/openwsman,kolbma/openwsman,kolbma/openwsman,Openwsman/openwsman,Openwsman/openwsman,vcrhonek/openwsman,kkaempf/openwsman,kolbma/openwsman