libxl: correct xenstore permissions on console device

When the console is connected to a domain other than dom0, the console
device's backend field should be set so the xenstore permissions for the
console device reflect the domain that will be accessing them.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

tools/libxl/libxl_create.c

@@ -967,6 +967,7 @@ static void domcreate_launch_dm(libxl__egc *egc, libxl__multidev *multidev,
         ret = init_console_info(&console, 0);
         if ( ret )
             goto error_out;
+        console.backend_domid = state->console_domid;
         libxl__device_console_add(gc, domid, &console, state);
         libxl__device_console_dispose(&console);
 
@@ -999,6 +1000,7 @@ static void domcreate_launch_dm(libxl__egc *egc, libxl__multidev *multidev,
                 d_config->num_vfbs, d_config->vfbs,
                 d_config->num_disks, &d_config->disks[0]);
 
+        console.backend_domid = state->console_domid;
         libxl__device_console_add(gc, domid, &console, state);
         libxl__device_console_dispose(&console);