Support installed version check for FreeBSD
Support installed version check for FreeBSD

see: https://github.com/serverspec/specinfra/pull/56

uroesch/serverspec,zakkie/serverspec,punkle/serverspec,smontanari/serverspec,naga2raja/serverspec,mekf/serverspec,aschmidt75/serverspec,Plus81/serverspec,elmundio87/serverspec,tacahilo/serverspec,pfaffle/serverspec,higanworks/serverspec,3100/serverspec,tagomoris/serverspec,ShawInnes/serverspec,inokappa/serverspec,DarrellMozingo/serverspec,elibus/serverspec,minimum2scp/serverspec,dhoer/serverspec,mizzy/serverspec,doc75/serverspec,ihassin/serverspec,supertylerc/serverspec,serverspec/serverspec,bitglue/serverspec,RoboticCheese/serverspec,cosmo0920/serverspec,sergueik/serverspec