Update install.sh

freebsd/install.sh

@@ -18,6 +18,7 @@ if [ .$portsnap_enabled = .'true' ]; then
 		portsnap fetch && portsnap update
 		echo "/usr/ports updated"
 	else
+ 		pkg install portsnap
 		portsnap fetch extract
 		echo "/usr/ports added"
 	fi