OS-5783 make .zonecontrol a mount from the GZ instead of a directory …

…in the dataset

Reviewed by: Robert Mustacchi <rm@joyent.com>
Approved by: Josh Wilsdon <josh@wilsdon.ca>

usr/src/lib/brand/lx/zone/platform.xml

@@ -59,6 +59,8 @@
 	    opt="ro" type="lofs" />
 	<global_mount special="/etc/zones/%z.xml"
 	    directory="/native/etc/zones/%z.xml" opt="ro" type="lofs" />
+	<global_mount special="/var/zonecontrol/%z" directory="/native/.zonecontrol"
+	    opt="ro,nodevices,nosetuid,noexec" type="lofs" />
 
 	<!-- Local filesystems to mount when booting the zone -->
 	<mount special="/native/dev" directory="/dev" type="lx_devfs" />