Fix FindRuby.cmake to work with cmake 2.4
Fix FindRuby.cmake to work with cmake 2.4

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