guests/netbsd: Include /usr/sbin in PATH for pkg_add command
guests/netbsd: Include /usr/sbin in PATH for pkg_add command

gitebra/vagrant,mitchellh/vagrant,sni/vagrant,mitchellh/vagrant,mwrock/vagrant,benh57/vagrant,PatrickLang/vagrant,benh57/vagrant,chrisroberts/vagrant,taliesins/vagrant,sni/vagrant,chrisroberts/vagrant,chrisroberts/vagrant,jtopper/vagrant,jtopper/vagrant,bdwyertech/vagrant,taliesins/vagrant,bshurts/vagrant,PatrickLang/vagrant,marxarelli/vagrant,mwrock/vagrant,jtopper/vagrant,justincampbell/vagrant,justincampbell/vagrant,taliesins/vagrant,bryson/vagrant,benh57/vagrant,bshurts/vagrant,bdwyertech/vagrant,crashlytics/vagrant,bryson/vagrant,chrisroberts/vagrant,crashlytics/vagrant,gitebra/vagrant,gitebra/vagrant,sni/vagrant,crashlytics/vagrant,bryson/vagrant,mwrock/vagrant,taliesins/vagrant,marxarelli/vagrant,PatrickLang/vagrant,mwrock/vagrant,gitebra/vagrant,mitchellh/vagrant,bshurts/vagrant,crashlytics/vagrant,justincampbell/vagrant,bdwyertech/vagrant,marxarelli/vagrant,PatrickLang/vagrant,marxarelli/vagrant,bdwyertech/vagrant,benh57/vagrant,justincampbell/vagrant,mitchellh/vagrant,sni/vagrant,bryson/vagrant,bshurts/vagrant,jtopper/vagrant