fix build
fix build

vnc directory is excluded by waf's glob. unfortunately, new console proxy has a folder named vnc

reviewed-by: edison

resmo/cloudstack,DaanHoogland/cloudstack,argv0/cloudstack,argv0/cloudstack,resmo/cloudstack,resmo/cloudstack,DaanHoogland/cloudstack,DaanHoogland/cloudstack,wido/cloudstack,wido/cloudstack,DaanHoogland/cloudstack,wido/cloudstack,cinderella/incubator-cloudstack,argv0/cloudstack,cinderella/incubator-cloudstack,cinderella/incubator-cloudstack,resmo/cloudstack,cinderella/incubator-cloudstack,GabrielBrascher/cloudstack,mufaddalq/cloudstack-datera-driver,GabrielBrascher/cloudstack,resmo/cloudstack,resmo/cloudstack,cinderella/incubator-cloudstack,DaanHoogland/cloudstack,wido/cloudstack,argv0/cloudstack,jcshen007/cloudstack,jcshen007/cloudstack,GabrielBrascher/cloudstack,mufaddalq/cloudstack-datera-driver,jcshen007/cloudstack,mufaddalq/cloudstack-datera-driver,jcshen007/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,wido/cloudstack,argv0/cloudstack,mufaddalq/cloudstack-datera-driver,GabrielBrascher/cloudstack,DaanHoogland/cloudstack,jcshen007/cloudstack,wido/cloudstack,DaanHoogland/cloudstack,mufaddalq/cloudstack-datera-driver,wido/cloudstack,resmo/cloudstack,argv0/cloudstack,jcshen007/cloudstack,jcshen007/cloudstack,mufaddalq/cloudstack-datera-driver